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4x-21=-5(-x+2)
We simplify the equation to the form, which is simple to understand
4x-21=-5(-x+2)
Reorder the terms in parentheses
4x-21=+(+5x-10)
Remove unnecessary parentheses
+4x-21=+5x-10
We move all terms containing x to the left and all other terms to the right.
+4x-5x=-10+21
We simplify left and right side of the equation.
-1x=+11
We divide both sides of the equation by -1 to get x.
x=-11
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