Question

Solve the system using substitution.

5x = -14 + y
3y = 20 + 4x

Answer 1

5x = -14 + y

5x +14 = y

y = 5x + 14

----------------

3y = 20 + 4x

3(5x+14) = 20 + 4x

15x+42 = 20 + 4x

I'll let you finish

Answer 2

y= 5x +14
insert at eq2

3(5x+14)= 20+4x
15x+42=20 +4x
x=2
y=5(2)+14
y=24

Answer 3

So @jim_thompson5910 just went all the way to 15x + 42 = 20 + 4x. Just combine like terms and isolate the variable :)

Answer 4

doesnt x= -2 and y = 4.... i may be wrong?

Answer 5

yes, x = -2 and y = 4

Answer 6

x=-2
y=4