4(-10+5b)=-120

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Solution for 4(-10+5b)=-120 equation: 


b in (-oo:+oo)

4*(5*b-10) = -120 // + 120

4*(5*b-10)+120 = 0

4*(5*b-10)+120 = 0

20*b+80 = 0

20*b+80 = 0

20*b+80 = 0 // - 80

20*b = -80 // : 20

b = -80/20

b = -4

b = -4

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