4(5a+10)=-20

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Solution for 4(5a+10)=-20 equation: 


a in (-oo:+oo)

4*(5*a+10) = -20 // + 20

4*(5*a+10)+20 = 0

4*(5*a+10)+20 = 0

20*a+60 = 0

20*a+60 = 0

20*a+60 = 0 // - 60

20*a = -60 // : 20

a = -60/20

a = -3

a = -3

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