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-1(x-9)-10=3
We simplify the equation to the form, which is simple to understand
-1(x-9)-10=3
Reorder the terms in parentheses
+(-1x+9)-10=3
Remove unnecessary parentheses
-1x+9-10=+3
We move all terms containing x to the left and all other terms to the right.
-1x=+3-9+10
We simplify left and right side of the equation.
-1x=+4
We divide both sides of the equation by -1 to get x.
x=-4
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