99-3x=4x+15

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Solution for 99-3x=4x+15 equation:


Simplifying
99 + -3x = 4x + 15

Reorder the terms:
99 + -3x = 15 + 4x

Solving
99 + -3x = 15 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
99 + -3x + -4x = 15 + 4x + -4x

Combine like terms: -3x + -4x = -7x
99 + -7x = 15 + 4x + -4x

Combine like terms: 4x + -4x = 0
99 + -7x = 15 + 0
99 + -7x = 15

Add '-99' to each side of the equation.
99 + -99 + -7x = 15 + -99

Combine like terms: 99 + -99 = 0
0 + -7x = 15 + -99
-7x = 15 + -99

Combine like terms: 15 + -99 = -84
-7x = -84

Divide each side by '-7'.
x = 12

Simplifying
x = 12

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