Question

Please help Show work

A 55
B 20
C 38
D 70

Answer 1

x = 20

Explanation:

→ Recall how many degrees on a straight line

180°

→ Form an equation

90 + 4x - 10 + x = 180

→ Simplify

80 + 5x = 180

→ Minus 80 from both sides

5x = 100

→ Divide both sides by 5

x = 20