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12-05-2021
Mathematics

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Please help Show work

A 55
B 20
C 38
D 70

Please help Show work A 55 B 20 C 38 D 70 class=

Respuesta :

12-05-2021

Answer:

x = 20

Step-by-step 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

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