2/5a-5=7

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Solution for 2/5a-5=7 equation: 


a in (-oo:+oo)

(2/5)*a-5 = 7 // - 7

(2/5)*a-7-5 = 0

2/5*a-12 = 0 // + 12

2/5*a = 12 // : 2/5

a = 12/2/5

a = 30

a = 30

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