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12y-7=45-y
We simplify the equation to the form, which is simple to understand
12y-7=45-y
We move all terms containing y to the left and all other terms to the right.
+12y+1y=+45+7
We simplify left and right side of the equation.
+13y=+52
We divide both sides of the equation by 13 to get y.
y=4
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