3y-21=-12y

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Solution for 3y-21=-12y equation:


Simplifying
3y + -21 = -12y

Reorder the terms:
-21 + 3y = -12y

Solving
-21 + 3y = -12y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '12y' to each side of the equation.
-21 + 3y + 12y = -12y + 12y

Combine like terms: 3y + 12y = 15y
-21 + 15y = -12y + 12y

Combine like terms: -12y + 12y = 0
-21 + 15y = 0

Add '21' to each side of the equation.
-21 + 21 + 15y = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 15y = 0 + 21
15y = 0 + 21

Combine like terms: 0 + 21 = 21
15y = 21

Divide each side by '15'.
y = 1.4

Simplifying
y = 1.4

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