Question

What is the x-coordinate of the intersection of the two equations below?
y= 2x + 3
y = x + 1

Answer 1

Answer:  x = -2

Explanation:

We can apply substitution like so

y = x+1

2x+3 = x+1 ... replaced y with 2x+3

2x-x = 1-3

x = -2

Answer 2

Answer:

x = -2

Explanation:

We can apply substitution like so

y = x+1

2x+3 = x+1 ... replaced y with 2x+3

2x-x = 1-3

x = -2