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4a-(a-5)=23
We simplify the equation to the form, which is simple to understand
4a-(a-5)=23
Remove unnecessary parentheses
4a-1a+5=23
We move all terms containing a to the left and all other terms to the right.
+4a-1a=+23-5
We simplify left and right side of the equation.
+3a=+18
We divide both sides of the equation by 3 to get a.
a=6
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