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3a - a - 2 = 4
We simplify the equation to the form, which is simple to understand
3a-a-2=4
We move all terms containing a to the left and all other terms to the right.
+3a-1a=+4+2
We simplify left and right side of the equation.
+2a=+6
We divide both sides of the equation by 2 to get a.
a=3
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