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2y+7y=15
We simplify the equation to the form, which is simple to understand
2y+7y=15
We move all terms containing y to the left and all other terms to the right.
+2y+7y=+15
We simplify left and right side of the equation.
+9y=+15
We divide both sides of the equation by 9 to get y.
y=1.66666666667
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