X+4+5x+3+4x=21

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Solution for X+4+5x+3+4x=21 equation:


Simplifying
X + 4 + 5x + 3 + 4x = 21

Reorder the terms:
4 + 3 + X + 5x + 4x = 21

Combine like terms: 4 + 3 = 7
7 + X + 5x + 4x = 21

Combine like terms: 5x + 4x = 9x
7 + X + 9x = 21

Solving
7 + X + 9x = 21

Solving for variable 'X'.

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

Add '-7' to each side of the equation.
7 + X + -7 + 9x = 21 + -7

Reorder the terms:
7 + -7 + X + 9x = 21 + -7

Combine like terms: 7 + -7 = 0
0 + X + 9x = 21 + -7
X + 9x = 21 + -7

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

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

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

Simplifying
X = 14 + -9x

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