398+x=421

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Solution for 398+x=421 equation: 


Simplifying
398 + x = 421

Solving
398 + x = 421

Solving for variable 'x'.

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

Add '-398' to each side of the equation.
398 + -398 + x = 421 + -398

Combine like terms: 398 + -398 = 0
0 + x = 421 + -398
x = 421 + -398

Combine like terms: 421 + -398 = 23
x = 23

Simplifying
x = 23

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