3a-30=1/2a

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Solution for 3a-30=1/2a equation: 


a in (-oo:+oo)

3*a-30 = (1/2)*a // - (1/2)*a

3*a-((1/2)*a)-30 = 0

3*a+(-1/2)*a-30 = 0

5/2*a-30 = 0 // + 30

5/2*a = 30 // : 5/2

a = 30/5/2

a = 12

a = 12

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