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-3(11x-7)=-33x+21
We simplify the equation to the form, which is simple to understand
-3(11x-7)=-33x+21
Reorder the terms in parentheses
+(-33x+21)=-33x+21
Remove unnecessary parentheses
-33x+21=-33x+21
We move all terms containing x to the left and all other terms to the right.
-33x+33x=+21-21
We simplify left and right side of the equation.
0x=0
0=0
This equation is an identity, so all real numbers are solutions.
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