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4(2y+.9)-3y=13.1
We simplify the equation to the form, which is simple to understand
4(2y+.9)-3y=13.1
Reorder the terms in parentheses
+(+8y+3.6)-3y=13.1
Remove unnecessary parentheses
+8y+3.6-3y=+13.1
We move all terms containing y to the left and all other terms to the right.
+8y-3y=+13.1-3.6
We simplify left and right side of the equation.
+5y=+9.5
We divide both sides of the equation by 5 to get y.
y=1.9
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