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Find the value of x. A.10 B.15 C.20 D.25
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Find the value of x.

A.10
B.15
C.20
D.25

Find the value of x. A.10 B.15 C.20 D.25-example-1
User Lazar Lazarov
by
5.3k points

1 Answer

2 votes

Answer:

C. 20

Explanation:

The two marked angles are supplementary, so ...

(5x+12)° +(3x +8)° = 180° . . . . fill in the given expressions

8x +20 = 180 . . . . . . . . . . . . . simplify

8x = 160 . . . . . . . . . . . . . . . . . subtract 20

x = 160/8 . . . . . . . . . . . . . . . . . divide by 8

x = 20

User Vincent Decaux
by
6.1k points
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