Question

Y=3x-5
6x+3y=15
solve for y

Answer 1

on both equation y equals to 1

Answer 2

y = 3x - 5

replace "y" inside the equation with "3x - 5"


6x + 3(3x - 5) = 15

distribute the 3 to both 3x and -5

3(3x) = 9x
3( -5) = -15

6x + 9x - 15 = 15

simplify
15x - 15 = 15

isolate the x

15x - 15 (+15) = 15 (+15)

15x = 30

15x/15 = 30/15

x = 2

Plug in x to one of two equations

y = 3x - 5
y = 3(2) - 5
y = 6 - 5
y = 1

y = 1 is your answer

hope this helps