X+9+1=21

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Solution for X+9+1=21 equation: 


Simplifying
X + 9 + 1 = 21

Reorder the terms:
9 + 1 + X = 21

Combine like terms: 9 + 1 = 10
10 + X = 21

Solving
10 + X = 21

Solving for variable 'X'.

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

Add '-10' to each side of the equation.
10 + -10 + X = 21 + -10

Combine like terms: 10 + -10 = 0
0 + X = 21 + -10
X = 21 + -10

Combine like terms: 21 + -10 = 11
X = 11

Simplifying
X = 11

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