6x-42=21-3x

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Solution for 6x-42=21-3x equation:


Simplifying
6x + -42 = 21 + -3x

Reorder the terms:
-42 + 6x = 21 + -3x

Solving
-42 + 6x = 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.
-42 + 6x + 3x = 21 + -3x + 3x

Combine like terms: 6x + 3x = 9x
-42 + 9x = 21 + -3x + 3x

Combine like terms: -3x + 3x = 0
-42 + 9x = 21 + 0
-42 + 9x = 21

Add '42' to each side of the equation.
-42 + 42 + 9x = 21 + 42

Combine like terms: -42 + 42 = 0
0 + 9x = 21 + 42
9x = 21 + 42

Combine like terms: 21 + 42 = 63
9x = 63

Divide each side by '9'.
x = 7

Simplifying
x = 7

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