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3x+12x-6=3(5x+5)
We simplify the equation to the form, which is simple to understand
3x+12x-6=3(5x+5)
Reorder the terms in parentheses
3x+12x-6=+(+15x+15)
Remove unnecessary parentheses
+3x+12x-6=+15x+15
We move all terms containing x to the left and all other terms to the right.
+3x+12x-15x=+15+6
We simplify left and right side of the equation.
0x=+21
0=21
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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