Question

Point M is the midpoint of segment AB. If AM = 50 – 3x and MB = –20 + 4x, find the value of x. x = -10 x = 10 x = -20 x = 20

Answer 1

AM=MB

50-3x=-20+4x

50=-20+7x

70=7x

10=x

Explanation:

Answer 2

(50-3x)-(-20+4x) = 0

50-3x+20-4x = 0

70-7x = 0

-7x = -70

7x = 70

x = 10