10+x=21

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Solution for 10+x=21 equation: 


Simplifying
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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