123=9y+4-7y

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Solution for 123=9y+4-7y equation:


Simplifying
123 = 9y + 4 + -7y

Reorder the terms:
123 = 4 + 9y + -7y

Combine like terms: 9y + -7y = 2y
123 = 4 + 2y

Solving
123 = 4 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
123 + -2y = 4 + 2y + -2y

Combine like terms: 2y + -2y = 0
123 + -2y = 4 + 0
123 + -2y = 4

Add '-123' to each side of the equation.
123 + -123 + -2y = 4 + -123

Combine like terms: 123 + -123 = 0
0 + -2y = 4 + -123
-2y = 4 + -123

Combine like terms: 4 + -123 = -119
-2y = -119

Divide each side by '-2'.
y = 59.5

Simplifying
y = 59.5

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