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3-(5-2x)=x-21
We simplify the equation to the form, which is simple to understand
3-(5-2x)=x-21
Remove unnecessary parentheses
3-5+2x=x-21
We move all terms containing x to the left and all other terms to the right.
+2x-1x=-21-3+5
We simplify left and right side of the equation.
+1x=-19
We divide both sides of the equation by 1 to get x.
x=-19
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