21-5x=15-x

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Solution for 21-5x=15-x equation:


Simplifying
21 + -5x = 15 + -1x

Solving
21 + -5x = 15 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
21 + -5x + x = 15 + -1x + x

Combine like terms: -5x + x = -4x
21 + -4x = 15 + -1x + x

Combine like terms: -1x + x = 0
21 + -4x = 15 + 0
21 + -4x = 15

Add '-21' to each side of the equation.
21 + -21 + -4x = 15 + -21

Combine like terms: 21 + -21 = 0
0 + -4x = 15 + -21
-4x = 15 + -21

Combine like terms: 15 + -21 = -6
-4x = -6

Divide each side by '-4'.
x = 1.5

Simplifying
x = 1.5

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