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1+\left(x-8\right)\left(-1\right)=7
Variable x cannot be equal to 8 since division by zero is not defined. Multiply both sides of the equation by x-8.
1-x+8=7
Use the distributive property to multiply x-8 by -1.
9-x=7
Add 1 and 8 to get 9.
-x=7-9
Subtract 9 from both sides.
-x=-2
Subtract 9 from 7 to get -2.
x=2
Multiply both sides by -1.