-7y-9=y+90

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Solution for -7y-9=y+90 equation:


Simplifying
-7y + -9 = y + 90

Reorder the terms:
-9 + -7y = y + 90

Reorder the terms:
-9 + -7y = 90 + y

Solving
-9 + -7y = 90 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-9 + -7y + -1y = 90 + y + -1y

Combine like terms: -7y + -1y = -8y
-9 + -8y = 90 + y + -1y

Combine like terms: y + -1y = 0
-9 + -8y = 90 + 0
-9 + -8y = 90

Add '9' to each side of the equation.
-9 + 9 + -8y = 90 + 9

Combine like terms: -9 + 9 = 0
0 + -8y = 90 + 9
-8y = 90 + 9

Combine like terms: 90 + 9 = 99
-8y = 99

Divide each side by '-8'.
y = -12.375

Simplifying
y = -12.375

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