4+5x+7x=100

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Solution for 4+5x+7x=100 equation: 


x in (-oo:+oo)

5*x+7*x+4 = 100 // - 100

5*x+7*x-100+4 = 0

12*x-96 = 0 // + 96

12*x = 96 // : 12

x = 96/12

x = 8

x = 8

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