43+x=21

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Solution for 43+x=21 equation: 


Simplifying
43 + x = 21

Solving
43 + x = 21

Solving for variable 'x'.

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

Add '-43' to each side of the equation.
43 + -43 + x = 21 + -43

Combine like terms: 43 + -43 = 0
0 + x = 21 + -43
x = 21 + -43

Combine like terms: 21 + -43 = -22
x = -22

Simplifying
x = -22

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