9-7x=77-21x

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Solution for 9-7x=77-21x equation:


Simplifying
9 + -7x = 77 + -21x

Solving
9 + -7x = 77 + -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.
9 + -7x + 21x = 77 + -21x + 21x

Combine like terms: -7x + 21x = 14x
9 + 14x = 77 + -21x + 21x

Combine like terms: -21x + 21x = 0
9 + 14x = 77 + 0
9 + 14x = 77

Add '-9' to each side of the equation.
9 + -9 + 14x = 77 + -9

Combine like terms: 9 + -9 = 0
0 + 14x = 77 + -9
14x = 77 + -9

Combine like terms: 77 + -9 = 68
14x = 68

Divide each side by '14'.
x = 4.857142857

Simplifying
x = 4.857142857

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