3x-9+x=84

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Solution for 3x-9+x=84 equation:


Simplifying
3x + -9 + x = 84

Reorder the terms:
-9 + 3x + x = 84

Combine like terms: 3x + x = 4x
-9 + 4x = 84

Solving
-9 + 4x = 84

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 4x = 84 + 9

Combine like terms: -9 + 9 = 0
0 + 4x = 84 + 9
4x = 84 + 9

Combine like terms: 84 + 9 = 93
4x = 93

Divide each side by '4'.
x = 23.25

Simplifying
x = 23.25

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