123=9y+4-7

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

Simplifying
123 = 9y + 4 + -7

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

Combine like terms: 4 + -7 = -3
123 = -3 + 9y

Solving
123 = -3 + 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.
123 + -9y = -3 + 9y + -9y

Combine like terms: 9y + -9y = 0
123 + -9y = -3 + 0
123 + -9y = -3

Add '-123' to each side of the equation.
123 + -123 + -9y = -3 + -123

Combine like terms: 123 + -123 = 0
0 + -9y = -3 + -123
-9y = -3 + -123

Combine like terms: -3 + -123 = -126
-9y = -126

Divide each side by '-9'.
y = 14

Simplifying
y = 14