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x-5(-4x)+3=21x-3
We simplify the equation to the form, which is simple to understand
x-5(-4x)+3=21x-3
Reorder the terms in parentheses
x+(+20x)+3=21x-3
Remove unnecessary parentheses
+x+20x+3=+21x-3
We move all terms containing x to the left and all other terms to the right.
+1x+20x-21x=-3-3
We simplify left and right side of the equation.
0x=-6
0=-6
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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