21.y+15=-6

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Solution for 21.y+15=-6 equation:


21.y+15=-6

We simplify the equation to the form, which is simple to understand 
21.y+15=-6

We move all terms containing y to the left and all other terms to the right. 
+21y=-6-15

We simplify left and right side of the equation. 
+21y=-21

We divide both sides of the equation by 21 to get y. 
y=-1

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