123=9y+4+7y

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

Simplifying
123 = 9y + 4 + 7y

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

Combine like terms: 9y + 7y = 16y
123 = 4 + 16y

Solving
123 = 4 + 16y

Solving for variable 'y'.

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

Add '-16y' to each side of the equation.
123 + -16y = 4 + 16y + -16y

Combine like terms: 16y + -16y = 0
123 + -16y = 4 + 0
123 + -16y = 4

Add '-123' to each side of the equation.
123 + -123 + -16y = 4 + -123

Combine like terms: 123 + -123 = 0
0 + -16y = 4 + -123
-16y = 4 + -123

Combine like terms: 4 + -123 = -119
-16y = -119

Divide each side by '-16'.
y = 7.4375

Simplifying
y = 7.4375