If (7x-20)˚ and the (3x+20)˚ are the corresponding angles of a pair of parallel line, find x
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7x - 20 = 3x + 20 ( corresponding angles are equal)
7x-3x = 20+20
4x =40
X= 40÷4
X = 10
7x-3x = 20+20
4x =40
X= 40÷4
X = 10
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