105-5x=2x+21

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Solution for 105-5x=2x+21 equation:


Simplifying
105 + -5x = 2x + 21

Reorder the terms:
105 + -5x = 21 + 2x

Solving
105 + -5x = 21 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
105 + -5x + -2x = 21 + 2x + -2x

Combine like terms: -5x + -2x = -7x
105 + -7x = 21 + 2x + -2x

Combine like terms: 2x + -2x = 0
105 + -7x = 21 + 0
105 + -7x = 21

Add '-105' to each side of the equation.
105 + -105 + -7x = 21 + -105

Combine like terms: 105 + -105 = 0
0 + -7x = 21 + -105
-7x = 21 + -105

Combine like terms: 21 + -105 = -84
-7x = -84

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

Simplifying
x = 12

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