a+1/2a+1/4a=100

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Solution for a+1/2a+1/4a=100 equation: 


a in (-oo:+oo)

a+(1/2)*a+(1/4)*a = 100 // - 100

a+(1/2)*a+(1/4)*a-100 = 0

7/4*a-100 = 0 // + 100

7/4*a = 100 // : 7/4

a = 100/7/4

a = 400/7

a = 400/7

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