x-5=3x-21

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Solution for x-5=3x-21 equation:


Simplifying
x + -5 = 3x + -21

Reorder the terms:
-5 + x = 3x + -21

Reorder the terms:
-5 + x = -21 + 3x

Solving
-5 + x = -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.
-5 + x + -3x = -21 + 3x + -3x

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

Combine like terms: 3x + -3x = 0
-5 + -2x = -21 + 0
-5 + -2x = -21

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

Combine like terms: -5 + 5 = 0
0 + -2x = -21 + 5
-2x = -21 + 5

Combine like terms: -21 + 5 = -16
-2x = -16

Divide each side by '-2'.
x = 8

Simplifying
x = 8

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