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4q-=4(q-1)
We simplify the equation to the form, which is simple to understand
4q-=4(q-1)
Reorder the terms in parentheses
4q=+(-4q+4)
Remove unnecessary parentheses
+4q=-4q+4
We move all terms containing q to the left and all other terms to the right.
+4q+4q=+4
We simplify left and right side of the equation.
+8q=+4
We divide both sides of the equation by 8 to get q.
q=0.5
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