6x+3+4x=123

Solution for 6x+3+4x=123 equation:

Simplifying
6x + 3 + 4x = 123

Reorder the terms:
3 + 6x + 4x = 123

Combine like terms: 6x + 4x = 10x
3 + 10x = 123

Solving
3 + 10x = 123

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 10x = 123 + -3

Combine like terms: 3 + -3 = 0
0 + 10x = 123 + -3
10x = 123 + -3

Combine like terms: 123 + -3 = 120
10x = 120

Divide each side by '10'.
x = 12

Simplifying
x = 12