3+5x+7x=123

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Solution for 3+5x+7x=123 equation: 


Simplifying
3 + 5x + 7x = 123

Combine like terms: 5x + 7x = 12x
3 + 12x = 123

Solving
3 + 12x = 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 + 12x = 123 + -3

Combine like terms: 3 + -3 = 0
0 + 12x = 123 + -3
12x = 123 + -3

Combine like terms: 123 + -3 = 120
12x = 120

Divide each side by '12'.
x = 10

Simplifying
x = 10

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