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The measure of an angle is 4y find the measure of its supplement

User ADoN
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the two angel must add to 180 since they are supplements, so
x+4y=180
x+4y-4y=180-4y
x+0y=180-4y
x+0=180-4y
x=180-4y
x=-4y+ 180
so the final answer is -4y+180
you welcome
User Sergi Juanola
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