15-20=12y+7

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Solution for 15-20=12y+7 equation:


Simplifying
15 + -20 = 12y + 7

Combine like terms: 15 + -20 = -5
-5 = 12y + 7

Reorder the terms:
-5 = 7 + 12y

Solving
-5 = 7 + 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.
-5 + -12y = 7 + 12y + -12y

Combine like terms: 12y + -12y = 0
-5 + -12y = 7 + 0
-5 + -12y = 7

Add '5' to each side of the equation.
-5 + 5 + -12y = 7 + 5

Combine like terms: -5 + 5 = 0
0 + -12y = 7 + 5
-12y = 7 + 5

Combine like terms: 7 + 5 = 12
-12y = 12

Divide each side by '-12'.
y = -1

Simplifying
y = -1

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