21+8x=81+4x

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Solution for 21+8x=81+4x equation:


Simplifying
21 + 8x = 81 + 4x

Solving
21 + 8x = 81 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
21 + 8x + -4x = 81 + 4x + -4x

Combine like terms: 8x + -4x = 4x
21 + 4x = 81 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + 4x = 81 + 0
21 + 4x = 81

Add '-21' to each side of the equation.
21 + -21 + 4x = 81 + -21

Combine like terms: 21 + -21 = 0
0 + 4x = 81 + -21
4x = 81 + -21

Combine like terms: 81 + -21 = 60
4x = 60

Divide each side by '4'.
x = 15

Simplifying
x = 15

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