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4y+4y-45=5y+20
We simplify the equation to the form, which is simple to understand
4y+4y-45=5y+20
We move all terms containing y to the left and all other terms to the right.
+4y+4y-5y=+20+45
We simplify left and right side of the equation.
+3y=+65
We divide both sides of the equation by 3 to get y.
y=21.666666666667
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