Thread: Help With Putting This Math Problem Into Code

Hello,
I need help to create the code for this math problem, I have the answer with me! Please help. I am just learning to create code. Thanks.

Two girls agree to go on a road trip together. They travel (x + 5)km on the first day. On the second day they travel 2km more than half of the distance they travelled on the first day. On the third day they drove 3 times as far as they did on the second day. If they drove 5000km total, find the value of x.

Answer:

The distance they drove on the first day: (x+5)

The distance they drove on the second day: 2 + (x+5)/2

The distance they drove on the third day: 3 [2 + (x+5)/2]

The total distance they travelled:

(day 1)+(day 2)+(day 3) = 5000

(x+5) + 2 + (x+5)/2 + 3 [2 + (x+5)/2] = 5000

(x + 5) + 2 + (x+5)/2 + 6 + 3(x+5)/2 = 5000

(x + 5) + 8 + 4(x+5)/2 = 5000

(x + 5) + 8 + 2(x + 5) = 5000

3(x+5) = 5000-8

3(x+5) = 4992

x + 5 = 1664

x = 1664 - 5

x = 1659 km

This is what I have:

package fridaybonusquestion;


/**
*
*
*/
public class FridayBonusQuestion {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
//Declare variables
double x = 0;
double day1 = (x + 5);
double day2 = 2 + (x + 5)/2;
double day3 = 3 *(2 + (x + 5)/2);
double totalkm = 5000;


//Calculate for the variable x
totalkm = (day1) + (day2) + day3;
totalkm = (day1) + (day2) + 6 + 3 *(day2);
totalkm = day1 + 8 + 4 * (day1/2);
totalkm = day1 + 8 + 2* (day1);

That's it. Not sure where to go from here.

I know what the do statement is but I'm not sure how I would use it in this situation. I have the math done for it but I'm not sure how I would apply this into code.

Would it be x = 5000 - 23/3? I am not sure how to do this.

Well actually with my class, this problem right now is a little more advanced than we have done because it is a bonus. I mean it sounds simple to do but I am not sure now to do it. I understand what you mean its just I don't know how to set it up.

All right I declared x, now how would I input the calculations into code?

Did you attach the code because I don't see it.

All right I included it in x. Now where do i go from this code???

package fridaybonusquestion;

public class FridayBonusQuestion {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {

// TODO code application logic here
//Declare variables
double x = 5000 - 23/3.0;
double day1 = (x + 5);
double day2 = 2 + (x + 5)/2;
double day3 = 3 *(2 + (x + 5)/2);
double totalkm = 5000;


//Calculate for the variable x
totalkm = (day1) + (day2) + day3;
totalkm = (day1) + (day2) + 6 + 3 *(day2);
totalkm = day1 + 8 + 4 * (day1/2);
totalkm = day1 + 8 + 2* (day1);



}





}

I tried to do it but it wouldn't print it out. Um, can you think of code that might work? Please?

Well, I tried it again but I am outputting: "Therefore, x equals: 4992.333333333333." so I am close.

Here is the problem.

Two girls agree to go on a road trip together. They travel (x + 5)km on the first day. On the second day they travel 2km more than half of the distance they travelled on the first day. On the third day they drove 3 times as far as they did on the second day. If they drove 5000km total, find the value of x.

Here is the code:

package fridaybonusquestion;


/**
*
*
*/
public class FridayBonusQuestion {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
//Declare variables
double x = 5000 - 23/3.0;
double day1 = (x + 5);
double day2 = 2 + (x + 5)/2;
double day3 = 3 *(2 + (x + 5)/2);
double totalkm = 5000;
double newtotalkm = 4992;
double finaltotalkm = 1664;



//Calculate for the variable x
totalkm = (day1) + (day2) + day3;
totalkm = (day1) + (day2) + 6 + 3 *(day2);
totalkm = day1 + 8 + 4 * (day1/2);
totalkm = day1 + 8 + 2* (day1);
newtotalkm = 3 * (day1);
finaltotalkm = day1 - 5;

System.out.println("Therefore, x equals: " + x + ".");

All right, thank you for your help.