Answer:
These equations are in slope-intercept form. I can use the y-intercept and slope to graph both lines. I plot the y-intercept and use rise over run to locate another point on the line. Then, I can draw a line through the two points.
Step-by-step explanation:
Answer is 2
x + 7(x + 1)
7x + 7
x + 7x + 7
8x + 7
x + 7(x + 1) = 8x + 7