1/7(x+21)-1/8(x-8)=x+7

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Solution for 1/7(x+21)-1/8(x-8)=x+7 equation: 


x in (-oo:+oo)

(1/7)*(x+21)-((1/8)*(x-8)) = x+7 // - x+7

(1/7)*(x+21)-((1/8)*(x-8))-x-7 = 0

(1/7)*(x+21)+(-1/8)*(x-8)-x-7 = 0

1/7*(x+21)-1/8*(x-8)-x-7 = 0

1/7*(x+21)-1/8*(x-8)-x-7 = 0

1/56*x-x-7+4 = 0

4-55/56*x-7 = 0

-55/56*x-3 = 0

-55/56*x-3 = 0

-55/56*x-3 = 0 // + 3

-55/56*x = 3 // : -55/56

x = 3/(-55/56)

x = -168/55

x = -168/55

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