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13+4x=4(x+5)
We simplify the equation to the form, which is simple to understand
13+4x=4(x+5)
Reorder the terms in parentheses
13+4x=+(+4x+20)
Remove unnecessary parentheses
+13+4x=+4x+20
We move all terms containing x to the left and all other terms to the right.
+4x-4x=+20-13
We simplify left and right side of the equation.
0x=+7
0=7
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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