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4a-(a-2)=19+3a
We simplify the equation to the form, which is simple to understand
4a-(a-2)=19+3a
Remove unnecessary parentheses
4a-1a+2=19+3a
We move all terms containing a to the left and all other terms to the right.
+4a-1a-3a=+19-2
We simplify left and right side of the equation.
a=+17
0=17
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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