3+x=15-9

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Solution for 3+x=15-9 equation: 


Simplifying
3 + x = 15 + -9

Combine like terms: 15 + -9 = 6
3 + x = 6

Solving
3 + x = 6

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + x = 6 + -3

Combine like terms: 3 + -3 = 0
0 + x = 6 + -3
x = 6 + -3

Combine like terms: 6 + -3 = 3
x = 3

Simplifying
x = 3

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