3+5+x=13

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Solution for 3+5+x=13 equation: 


Simplifying
3 + 5 + x = 13

Combine like terms: 3 + 5 = 8
8 + x = 13

Solving
8 + x = 13

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + x = 13 + -8

Combine like terms: 8 + -8 = 0
0 + x = 13 + -8
x = 13 + -8

Combine like terms: 13 + -8 = 5
x = 5

Simplifying
x = 5

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