Question

Solving system by substitution
Y=3x
Y=x+4

Answer 1

y=3x is given so you put 3x in the equation sooo... u get 2

Explanation:

Y = x + 4

3x = x + 4

3x - x = 4

2x = 4

x = 2

Answer 2

So we're given Y = 3x.

We now can replace Y, for 3x in the equation:

Y = x + 4

3x = x + 4

3x - x = 4

2x = 4

x = 2