-4a=40

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Solution for -4a=40 equation: 


a in (-oo:+oo)

-4*a = 40 // - 40

-4*a-40 = 0

-4*a-40 = 0 // + 40

-4*a = 40 // : -4

a = 40/(-4)

a = -10

a = -10

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