9+4x+x=84

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Solution for 9+4x+x=84 equation: 


Simplifying
9 + 4x + x = 84

Combine like terms: 4x + x = 5x
9 + 5x = 84

Solving
9 + 5x = 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 + 5x = 84 + -9

Combine like terms: 9 + -9 = 0
0 + 5x = 84 + -9
5x = 84 + -9

Combine like terms: 84 + -9 = 75
5x = 75

Divide each side by '5'.
x = 15

Simplifying
x = 15

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