Question

5x + y = 13
3x = 15 – 3y

another system of equations problem

Answer 1

Divide the second eqn by 3 nd tell me vat u get?

Answer 2

you mean multiply?

Answer 3

5x + y = 13
3x = 15 – 3y

Bring all x terms to one side for both equations,

5x + y = 13
3x - 13y = 15

We wish to make one of the coefficients same in both equations, so we can cancel it.

5x*3 + 3*y = 13*3
3x*5 + 13y*5 = 15*5

15x + 3y = 39
15x + 65y = 75

Cancel 15x from both equations,
-62y = -36
62y = 36
y = 36/62 = 18/31