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13y+7y=20
We simplify the equation to the form, which is simple to understand
13y+7y=20
We move all terms containing y to the left and all other terms to the right.
+13y+7y=+20
We simplify left and right side of the equation.
+20y=+20
We divide both sides of the equation by 20 to get y.
y=1
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