Question

Solve using substitution
y = 3x - 4
3x + y = -4

Answer 1

y= 3x –4

3x + y = –4

3x + (3x –4) = –4

3x+3x – 4 = – 4

6x = – 4 +4

6x=0 —> x= 0/6 —> x=0

x = 0

y = 3x – 4 —> y = 3(0) – 4 = – 4

y = – 4

So; (x , y) —> (0 , – 4 )

I hope I helped you^_^

Answer 2

(0,-4)

Explanation:

3x + y = -4

3x + (3x - 4) = -4

3x + 3x - 4 = -4

6x = 0

x = 0

y = 3(0) - 4

y = -4