7y-21-4y=-6

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Solution for 7y-21-4y=-6 equation:


7y-21-4y=-6

We simplify the equation to the form, which is simple to understand 
7y-21-4y=-6

We move all terms containing y to the left and all other terms to the right. 
+7y-4y=-6+21

We simplify left and right side of the equation. 
+3y=+15

We divide both sides of the equation by 3 to get y. 
y=5

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