You can put this solution on YOUR website! find the measure of a supplement of angle R where angle R is equal to 6x+15
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If two angles are supplementary, the sum of the two angles = 180
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Therefore, the
"supplement of angle R" = 180 - (6x+15)
"supplement of angle R" = 180 - 6x -15
"supplement of angle R" = 165 - 6x