8y+7=12y-9

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Solution for 8y+7=12y-9 equation:


Simplifying
8y + 7 = 12y + -9

Reorder the terms:
7 + 8y = 12y + -9

Reorder the terms:
7 + 8y = -9 + 12y

Solving
7 + 8y = -9 + 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.
7 + 8y + -12y = -9 + 12y + -12y

Combine like terms: 8y + -12y = -4y
7 + -4y = -9 + 12y + -12y

Combine like terms: 12y + -12y = 0
7 + -4y = -9 + 0
7 + -4y = -9

Add '-7' to each side of the equation.
7 + -7 + -4y = -9 + -7

Combine like terms: 7 + -7 = 0
0 + -4y = -9 + -7
-4y = -9 + -7

Combine like terms: -9 + -7 = -16
-4y = -16

Divide each side by '-4'.
y = 4

Simplifying
y = 4

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