1/7(x+21)-1/4(x-4)=x+9

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Solution for 1/7(x+21)-1/4(x-4)=x+9 equation: 


x in (-oo:+oo)

(1/7)*(x+21)-((1/4)*(x-4)) = x+9 // - x+9

(1/7)*(x+21)-((1/4)*(x-4))-x-9 = 0

(1/7)*(x+21)+(-1/4)*(x-4)-x-9 = 0

1/7*(x+21)-1/4*(x-4)-x-9 = 0

1/7*(x+21)-1/4*(x-4)-x-9 = 0

4-3/28*x-x-9 = 0

4-31/28*x-9 = 0

-31/28*x-5 = 0

-31/28*x-5 = 0

-31/28*x-5 = 0 // + 5

-31/28*x = 5 // : -31/28

x = 5/(-31/28)

x = -140/31

x = -140/31

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