123-7x=11x+21

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Solution for 123-7x=11x+21 equation:


Simplifying
123 + -7x = 11x + 21

Reorder the terms:
123 + -7x = 21 + 11x

Solving
123 + -7x = 21 + 11x

Solving for variable 'x'.

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

Add '-11x' to each side of the equation.
123 + -7x + -11x = 21 + 11x + -11x

Combine like terms: -7x + -11x = -18x
123 + -18x = 21 + 11x + -11x

Combine like terms: 11x + -11x = 0
123 + -18x = 21 + 0
123 + -18x = 21

Add '-123' to each side of the equation.
123 + -123 + -18x = 21 + -123

Combine like terms: 123 + -123 = 0
0 + -18x = 21 + -123
-18x = 21 + -123

Combine like terms: 21 + -123 = -102
-18x = -102

Divide each side by '-18'.
x = 5.666666667

Simplifying
x = 5.666666667

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