adeli1313 adeli1313

10-06-2020
Mathematics

contestada

Solve for the value of x
A) 12
B) 42
C) -12
D) -42

Solve for the value of x A 12 B 42 C 12 D 42 class=

Respuesta :

anonlol3 anonlol3

10-06-2020

The angles of a triangle will always add up to be 180 degrees total.

x + 82 + x + 82 + 40 = 180
2x + 164 + 40 = 180
2x + 204 = 180
Subtract 204 from both sides.
Think of it as “180 + (-204)”
2x = -24
Divide each side by 2.
x = -12

Answer: x = -12

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