.20*(2-y)+.50y=90

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Solution for .20*(2-y)+.50y=90 equation:


.20*(2-y)+.50y=90

We simplify the equation to the form, which is simple to understand 
.20*(2-y)+.50y=90

Reorder the terms in parentheses
+( + 0.4-0.2y)+.50y=90

Remove unnecessary parentheses
 + 0.4-0.2y+.50y=+90

We move all terms containing y to the left and all other terms to the right. 
-0.2y + 0.5y=+90-0.4

We simplify left and right side of the equation. 
 + 0.3y=+89.6

We divide both sides of the equation by 0.3 to get y. 
y=298.666666667

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