7y-4+31=9y

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Solution for 7y-4+31=9y equation:


Simplifying
7y + -4 + 31 = 9y

Reorder the terms:
-4 + 31 + 7y = 9y

Combine like terms: -4 + 31 = 27
27 + 7y = 9y

Solving
27 + 7y = 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
27 + 7y + -9y = 9y + -9y

Combine like terms: 7y + -9y = -2y
27 + -2y = 9y + -9y

Combine like terms: 9y + -9y = 0
27 + -2y = 0

Add '-27' to each side of the equation.
27 + -27 + -2y = 0 + -27

Combine like terms: 27 + -27 = 0
0 + -2y = 0 + -27
-2y = 0 + -27

Combine like terms: 0 + -27 = -27
-2y = -27

Divide each side by '-2'.
y = 13.5

Simplifying
y = 13.5

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