-7a-4=-3a-20

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Solution for -7a-4=-3a-20 equation: 


a in (-oo:+oo)

-7*a-4 = -3*a-20 // + -3*a-20

20-7*a-(-3*a)-4 = 0

3*a-7*a-4+20 = 0

16-4*a = 0 // - 16

-4*a = -16 // : -4

a = -16/(-4)

a = 4

a = 4

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