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4*(5*x-7) = 132 // - 132
4*(5*x-7)-132 = 0
4*(5*x-7)-132 = 0
20*x-160 = 0
20*x-160 = 0
20*x-160 = 0 // + 160
20*x = 160 // : 20
x = 160/20
x = 8
x = 8
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