123=3(1-5x)

Solution for 123=3(1-5x) equation:

Simplifying
123 = 3(1 + -5x)
123 = (1 * 3 + -5x * 3)
123 = (3 + -15x)

Solving
123 = 3 + -15x

Solving for variable 'x'.

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

Add '15x' to each side of the equation.
123 + 15x = 3 + -15x + 15x

Combine like terms: -15x + 15x = 0
123 + 15x = 3 + 0
123 + 15x = 3

Add '-123' to each side of the equation.
123 + -123 + 15x = 3 + -123

Combine like terms: 123 + -123 = 0
0 + 15x = 3 + -123
15x = 3 + -123

Combine like terms: 3 + -123 = -120
15x = -120

Divide each side by '15'.
x = -8

Simplifying
x = -8