99-5x=7x+21

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Solution for 99-5x=7x+21 equation:


Simplifying
99 + -5x = 7x + 21

Reorder the terms:
99 + -5x = 21 + 7x

Solving
99 + -5x = 21 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
99 + -5x + -7x = 21 + 7x + -7x

Combine like terms: -5x + -7x = -12x
99 + -12x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
99 + -12x = 21 + 0
99 + -12x = 21

Add '-99' to each side of the equation.
99 + -99 + -12x = 21 + -99

Combine like terms: 99 + -99 = 0
0 + -12x = 21 + -99
-12x = 21 + -99

Combine like terms: 21 + -99 = -78
-12x = -78

Divide each side by '-12'.
x = 6.5

Simplifying
x = 6.5

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