5x-21=2x-4

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Solution for 5x-21=2x-4 equation:


Simplifying
5x + -21 = 2x + -4

Reorder the terms:
-21 + 5x = 2x + -4

Reorder the terms:
-21 + 5x = -4 + 2x

Solving
-21 + 5x = -4 + 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.
-21 + 5x + -2x = -4 + 2x + -2x

Combine like terms: 5x + -2x = 3x
-21 + 3x = -4 + 2x + -2x

Combine like terms: 2x + -2x = 0
-21 + 3x = -4 + 0
-21 + 3x = -4

Add '21' to each side of the equation.
-21 + 21 + 3x = -4 + 21

Combine like terms: -21 + 21 = 0
0 + 3x = -4 + 21
3x = -4 + 21

Combine like terms: -4 + 21 = 17
3x = 17

Divide each side by '3'.
x = 5.666666667

Simplifying
x = 5.666666667

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