21+12x=15+13x

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Solution for 21+12x=15+13x equation:


Simplifying
21 + 12x = 15 + 13x

Solving
21 + 12x = 15 + 13x

Solving for variable 'x'.

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

Add '-13x' to each side of the equation.
21 + 12x + -13x = 15 + 13x + -13x

Combine like terms: 12x + -13x = -1x
21 + -1x = 15 + 13x + -13x

Combine like terms: 13x + -13x = 0
21 + -1x = 15 + 0
21 + -1x = 15

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

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

Combine like terms: 15 + -21 = -6
-1x = -6

Divide each side by '-1'.
x = 6

Simplifying
x = 6

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