84=(9+4x)+4x

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


Simplifying
84 = (9 + 4x) + 4x

Remove parenthesis around (9 + 4x)
84 = 9 + 4x + 4x

Combine like terms: 4x + 4x = 8x
84 = 9 + 8x

Solving
84 = 9 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
84 + -8x = 9 + 8x + -8x

Combine like terms: 8x + -8x = 0
84 + -8x = 9 + 0
84 + -8x = 9

Add '-84' to each side of the equation.
84 + -84 + -8x = 9 + -84

Combine like terms: 84 + -84 = 0
0 + -8x = 9 + -84
-8x = 9 + -84

Combine like terms: 9 + -84 = -75
-8x = -75

Divide each side by '-8'.
x = 9.375

Simplifying
x = 9.375

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