find the measure of each interior angle using given info. 1.2(2x-15)+2(x)=180 2.2x+20+3x-10+2x-10+2x=180 3.2x+16+x+14+2x+16+x+14=180 4.7x+4x+7x+4x+7x+7x
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Add like terms: for No. 1. 2(2x-15)+2(x)=180 2(2x - 15) = (4x - 30) 2(x) = 2x Now add Both: 4x - 30 + 2x = (4x + 2x) - 30 --- Here you are grouping like terms. = 6x - 30 Now: 6x - 30 =180 6x = 210 x= 210/6
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