(1/4)(7+3r)=(-1/8)r

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Solution for (1/4)(7+3r)=(-1/8)r equation: 


r in (-oo:+oo)

(1/4)*(3*r+7) = (-1/8)*r // - (-1/8)*r

(1/4)*(3*r+7)-((-1/8)*r) = 0

(1/4)*(3*r+7)+(1/8)*r = 0

1/4*(3*r+7)+r/8 = 0

(1/4*8*(3*r+7))/8+r/8 = 0

1/4*8*(3*r+7)+r = 0

7*r+14 = 0

(7*r+14)/8 = 0

(7*r+14)/8 = 0 // * 8

7*r+14 = 0

7*r+14 = 0 // - 14

7*r = -14 // : 7

r = -14/7

r = -2

r = -2

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