Solving for X, I need the set up and explanation, help.

x = 8

Step-by-step explanation:

Angles in a triangle add up to 180

180 = 60 + 60 + (-12 + 9x)     [Subtract both 60s by the answer (, both are positive) ]

-60    -60

120 = 60 + (-12 + 9x)

-60   -60

60 = -12 + 9x    [Add 12 to the 60, the 12 shown is negative]

+12   +12

72 = 9x

72/9 = x

8 = x

x = 8

Step-by-step explanation:

60° + 60° + (-12 + 9x) = 180°

120° + (-12 + 9x) = 180°

120° - 12 + 9x = 180°

108 + 9x = 180°

-108           -108

9x = 72

/9     /9

x = 8

18

step-by-step explanation:

i can answer this question sweetie!

step-by-step explanation: