Question

What is answer for x,y?

Answer 1

7x +3y = 8

6x -3y =5

First solve for X by adding the two equations together:

13x = 13

Divide both sides by 13:

x = 13 / 13

x = 1

Replace x with 1 in the first equation:

7(1) + 3y = 8

Solve for y:

7 + 3y = 8

subtract 7 from each side:

3y = 1

Divide both sides by 3:

y = 1/3

Now solve for x-y :

1 - 1/3 = 2/3

The answer is B. 2/3