Answer:
12
Step-by-step explanation:
Note that when the two angles are added together, they will equal 180 degrees (being a straight line). Set the equation:
10x - 20 + 6x + 8 = 180
Simplify. Combine like terms:
(10x + 6x) + (-20 + 8) = 180
16x - 12 = 180
Isolate the variable (x). Do the opposite of PEMDAS. Note the equal sign, what you do to one side, you do to the other. Add 12 to both sides
16x - 12 (+12) = 180 (+12)
16x = 180 + 12
16x = 192
Isolate the variable (x). Divide 16 from both sides
(16x)/16 = (192)/16
x = 192/16
x = 12
12 is your value for x.
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