6x-21=5x-4x

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Solution for 6x-21=5x-4x equation:


Simplifying
6x + -21 = 5x + -4x

Reorder the terms:
-21 + 6x = 5x + -4x

Combine like terms: 5x + -4x = 1x
-21 + 6x = 1x

Solving
-21 + 6x = 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-21 + 6x + -1x = 1x + -1x

Combine like terms: 6x + -1x = 5x
-21 + 5x = 1x + -1x

Combine like terms: 1x + -1x = 0
-21 + 5x = 0

Add '21' to each side of the equation.
-21 + 21 + 5x = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 5x = 0 + 21
5x = 0 + 21

Combine like terms: 0 + 21 = 21
5x = 21

Divide each side by '5'.
x = 4.2

Simplifying
x = 4.2

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