12r/4+3(r+4)-5(-2r)

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Solution for 12r/4+3(r+4)-5(-2r) equation: 


r in (-oo:+oo)

3*(r+4)+(12*r)/4-(-2*5*r) = 0

3*(r+4)+(12*r)/4+10*r = 0

3*(r+4)+3*r+10*r = 0

3*(r+4)+3*r+10*r = 0

6*r+10*r+12 = 0

16*r+12 = 0

16*r+12 = 0

16*r+12 = 0 // - 12

16*r = -12 // : 16

r = -12/16

r = -3/4

r = -3/4

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