M angle 2=x+81 . Solve

x = -11

Step-by-step explanation:

I can't really explain, but I know those red dashes means that the lines that is dashed are the same length, which means that "x + 81 equals to 70. We can also write it as "x + 81" + 70 + m = 180.

70 = 81 + x

70 - 81 = x

-11 = x

a and c

for infinitely many solutions we require both left and right sides to be equal

distribute and simplify

a

14 - 8x = 20 - 8x - 6 = 14 - 8x ← both sides equal so infinite solutions

b

6x - 54 = 6x - 54 + x = 7x - 54 ← not equal

c

4x + 16 = 4x + 10 + 6 = 4x + 16 ← both sides equal so infinite solutions

d

5x - 40 + 10 = 5x + 10

5x - 30 = 5x + 10 ← not equal