X+4+5=30

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Solution for X+4+5=30 equation: 


Simplifying
X + 4 + 5 = 30

Reorder the terms:
4 + 5 + X = 30

Combine like terms: 4 + 5 = 9
9 + X = 30

Solving
9 + X = 30

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 + X = 30 + -9

Combine like terms: 9 + -9 = 0
0 + X = 30 + -9
X = 30 + -9

Combine like terms: 30 + -9 = 21
X = 21

Simplifying
X = 21

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