21x-13=12+13x

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


Simplifying
21x + -13 = 12 + 13x

Reorder the terms:
-13 + 21x = 12 + 13x

Solving
-13 + 21x = 12 + 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.
-13 + 21x + -13x = 12 + 13x + -13x

Combine like terms: 21x + -13x = 8x
-13 + 8x = 12 + 13x + -13x

Combine like terms: 13x + -13x = 0
-13 + 8x = 12 + 0
-13 + 8x = 12

Add '13' to each side of the equation.
-13 + 13 + 8x = 12 + 13

Combine like terms: -13 + 13 = 0
0 + 8x = 12 + 13
8x = 12 + 13

Combine like terms: 12 + 13 = 25
8x = 25

Divide each side by '8'.
x = 3.125

Simplifying
x = 3.125

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