4+5+x=13

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Solution for 4+5+x=13 equation: 


Simplifying
4 + 5 + x = 13

Combine like terms: 4 + 5 = 9
9 + x = 13

Solving
9 + x = 13

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 = 13 + -9

Combine like terms: 9 + -9 = 0
0 + x = 13 + -9
x = 13 + -9

Combine like terms: 13 + -9 = 4
x = 4

Simplifying
x = 4

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