Question

Find the value of x

x+2x+90°


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Answer 1

Answer:

$3x + 90 = 180 \\ 3x = 180 - 90 \\ 3x = 90 \\ x = 90 \div 3 \\ x = 30$

Answer 2

Answer:

x+2x = -90

3x= -90

x= -90/3

x= -30

2x= -30× 2= -60