3-3/2a=21

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Solution for 3-3/2a=21 equation: 


a in (-oo:+oo)

3-((3/2)*a) = 21 // - 21

3-((3/2)*a)-21 = 0

(-3/2)*a-21+3 = 0

-3/2*a-18 = 0 // + 18

-3/2*a = 18 // : -3/2

a = 18/(-3/2)

a = -12

a = -12

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