Answer:
x = 29
Explanation:
Supplementary angles add up to 180 degrees:
4x+64 = 180
Subtract 64 from both sides:
4x+64-64 = 180-64
4x = 116
Divide both sides by 4:
4x/4 = 116/4
180 - 64= 116
116 divided by 4 = 29
x=29
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