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\left(x-1\right)\times 7+x+1=x\times 6
Variable x cannot be equal to any of the values -1,0,1 since division by zero is not defined. Multiply both sides of the equation by x\left(x-1\right)\left(x+1\right), the least common multiple of x^{2}+x,x^{2}-x,x^{2}-1.
7x-7+x+1=x\times 6
Use the distributive property to multiply x-1 by 7.
8x-7+1=x\times 6
Combine 7x and x to get 8x.
8x-6=x\times 6
Add -7 and 1 to get -6.
8x-6-x\times 6=0
Subtract x\times 6 from both sides.
2x-6=0
Combine 8x and -x\times 6 to get 2x.
2x=6
Add 6 to both sides. Anything plus zero gives itself.
x=\frac{6}{2}
Divide both sides by 2.
x=3
Divide 6 by 2 to get 3.