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4x-7=x+3(4+x)
We simplify the equation to the form, which is simple to understand
4x-7=x+3(4+x)
Reorder the terms in parentheses
4x-7=x+(+12+3x)
Remove unnecessary parentheses
+4x-7=+x+12+3x
We move all terms containing x to the left and all other terms to the right.
+4x-1x-3x=+12+7
We simplify left and right side of the equation.
0x=+19
0=19
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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