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7x +20 +3x = 180 ( adjacent angles )
so , 10x +20 =180
10x =180-20
10x = 160
x = 160÷10
hence , x = 16
so , 10x +20 =180
10x =180-20
10x = 160
x = 160÷10
hence , x = 16
gunjan010773p2afz3:
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