Answer:x = 7
Step-by-step explanation:We are given that:l = 7x - 7
m = 4x + 14
We want to have:l = m
Therefore, we will simply equate the two equations and solve for x as follows:7x - 7 = 4x + 14
7x - 7 - 4x = 4x + 14 - 4x
3x - 7 = 14
3x - 7 + 7 = 14 + 7
3x = 21
x =

x = 7
Hope this helps :)