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3-1-7y=9
We simplify the equation to the form, which is simple to understand
3-1-7y=9
We move all terms containing y to the left and all other terms to the right.
-7y=+9-3+1
We simplify left and right side of the equation.
-7y=+7
We divide both sides of the equation by -7 to get y.
y=-1
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