5-7x=81-21x

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Solution for 5-7x=81-21x equation:


Simplifying
5 + -7x = 81 + -21x

Solving
5 + -7x = 81 + -21x

Solving for variable 'x'.

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

Add '21x' to each side of the equation.
5 + -7x + 21x = 81 + -21x + 21x

Combine like terms: -7x + 21x = 14x
5 + 14x = 81 + -21x + 21x

Combine like terms: -21x + 21x = 0
5 + 14x = 81 + 0
5 + 14x = 81

Add '-5' to each side of the equation.
5 + -5 + 14x = 81 + -5

Combine like terms: 5 + -5 = 0
0 + 14x = 81 + -5
14x = 81 + -5

Combine like terms: 81 + -5 = 76
14x = 76

Divide each side by '14'.
x = 5.428571429

Simplifying
x = 5.428571429

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