12y-9=17y+21

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Solution for 12y-9=17y+21 equation:


Simplifying
12y + -9 = 17y + 21

Reorder the terms:
-9 + 12y = 17y + 21

Reorder the terms:
-9 + 12y = 21 + 17y

Solving
-9 + 12y = 21 + 17y

Solving for variable 'y'.

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

Add '-17y' to each side of the equation.
-9 + 12y + -17y = 21 + 17y + -17y

Combine like terms: 12y + -17y = -5y
-9 + -5y = 21 + 17y + -17y

Combine like terms: 17y + -17y = 0
-9 + -5y = 21 + 0
-9 + -5y = 21

Add '9' to each side of the equation.
-9 + 9 + -5y = 21 + 9

Combine like terms: -9 + 9 = 0
0 + -5y = 21 + 9
-5y = 21 + 9

Combine like terms: 21 + 9 = 30
-5y = 30

Divide each side by '-5'.
y = -6

Simplifying
y = -6

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