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zmey [24]
3 years ago
15

PLEASE HELP ME ON THIS MATH PROBLEM! I need an explanation

Mathematics
1 answer:
saul85 [17]3 years ago
6 0

Answer:

s. -30

Step-by-step explanation:

All the angles in a triangle equal 180 so:

-2x - x + 90 = 180

add like terms

-3x + 90 = 180

subtracts 90 from both sides

-3x = 90

divide both sides by -3

x = -30

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