7y-12y-20=80

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Solution for 7y-12y-20=80 equation:


Simplifying
7y + -12y + -20 = 80

Reorder the terms:
-20 + 7y + -12y = 80

Combine like terms: 7y + -12y = -5y
-20 + -5y = 80

Solving
-20 + -5y = 80

Solving for variable 'y'.

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

Add '20' to each side of the equation.
-20 + 20 + -5y = 80 + 20

Combine like terms: -20 + 20 = 0
0 + -5y = 80 + 20
-5y = 80 + 20

Combine like terms: 80 + 20 = 100
-5y = 100

Divide each side by '-5'.
y = -20

Simplifying
y = -20

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