139-7x=9x+21

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Solution for 139-7x=9x+21 equation:


Simplifying
139 + -7x = 9x + 21

Reorder the terms:
139 + -7x = 21 + 9x

Solving
139 + -7x = 21 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
139 + -7x + -9x = 21 + 9x + -9x

Combine like terms: -7x + -9x = -16x
139 + -16x = 21 + 9x + -9x

Combine like terms: 9x + -9x = 0
139 + -16x = 21 + 0
139 + -16x = 21

Add '-139' to each side of the equation.
139 + -139 + -16x = 21 + -139

Combine like terms: 139 + -139 = 0
0 + -16x = 21 + -139
-16x = 21 + -139

Combine like terms: 21 + -139 = -118
-16x = -118

Divide each side by '-16'.
x = 7.375

Simplifying
x = 7.375

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