7y-21=4y-7

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


7y-21=4y-7

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

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

We simplify left and right side of the equation. 
+3y=+14

We divide both sides of the equation by 3 to get y. 
y=4.6666666666667

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