7(-21)-3y=-21

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Solution for 7(-21)-3y=-21 equation:


7(-21)-3y=-21

We simplify the equation to the form, which is simple to understand 
7(-21)-3y=-21

Reorder the terms in parentheses
+(-147)-3y=-21

Remove unnecessary parentheses
-147-3y=-21

We move all terms containing y to the left and all other terms to the right. 
-3y=-21+147

We simplify left and right side of the equation. 
-3y=+126

We divide both sides of the equation by -3 to get y. 
y=-42

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