45-3x=3x+21

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Solution for 45-3x=3x+21 equation:


Simplifying
45 + -3x = 3x + 21

Reorder the terms:
45 + -3x = 21 + 3x

Solving
45 + -3x = 21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
45 + -3x + -3x = 21 + 3x + -3x

Combine like terms: -3x + -3x = -6x
45 + -6x = 21 + 3x + -3x

Combine like terms: 3x + -3x = 0
45 + -6x = 21 + 0
45 + -6x = 21

Add '-45' to each side of the equation.
45 + -45 + -6x = 21 + -45

Combine like terms: 45 + -45 = 0
0 + -6x = 21 + -45
-6x = 21 + -45

Combine like terms: 21 + -45 = -24
-6x = -24

Divide each side by '-6'.
x = 4

Simplifying
x = 4

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