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\left(x-1\right)\times 7+\left(x+1\right)\times 3=x
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+\left(x+1\right)\times 3=x
Use the distributive property to multiply x-1 by 7.
7x-7+3x+3=x
Use the distributive property to multiply x+1 by 3.
10x-7+3=x
Combine 7x and 3x to get 10x.
10x-4=x
Add -7 and 3 to get -4.
10x-4-x=0
Subtract x from both sides.
9x-4=0
Combine 10x and -x to get 9x.
9x=4
Add 4 to both sides. Anything plus zero gives itself.
x=\frac{4}{9}
Divide both sides by 9.