Examples on how to do them:
Find the value of x if RS = 24 cm
24 = 6x - 4 + 10
6x - 4 = 14
6x = 18
x = 3
Find the measure of the given line segment.
2x + 7 = 4(x-3)
7 + 12 = 4x 2x
19 = 2x
x = 9.5
Now after all that, those are some examples on how to calculate line segments.