13+x+2x=25

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Solution for 13+x+2x=25 equation: 


Simplifying
13 + x + 2x = 25

Combine like terms: x + 2x = 3x
13 + 3x = 25

Solving
13 + 3x = 25

Solving for variable 'x'.

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

Add '-13' to each side of the equation.
13 + -13 + 3x = 25 + -13

Combine like terms: 13 + -13 = 0
0 + 3x = 25 + -13
3x = 25 + -13

Combine like terms: 25 + -13 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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