8-7x=84-21x

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Solution for 8-7x=84-21x equation:


Simplifying
8 + -7x = 84 + -21x

Solving
8 + -7x = 84 + -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.
8 + -7x + 21x = 84 + -21x + 21x

Combine like terms: -7x + 21x = 14x
8 + 14x = 84 + -21x + 21x

Combine like terms: -21x + 21x = 0
8 + 14x = 84 + 0
8 + 14x = 84

Add '-8' to each side of the equation.
8 + -8 + 14x = 84 + -8

Combine like terms: 8 + -8 = 0
0 + 14x = 84 + -8
14x = 84 + -8

Combine like terms: 84 + -8 = 76
14x = 76

Divide each side by '14'.
x = 5.428571429

Simplifying
x = 5.428571429

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