[9+3x]=39

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Solution for [9+3x]=39 equation: 


Simplifying
[9 + 3x] = 39

Remove brackets around [9 + 3x]
9 + 3x = 39

Solving
9 + 3x = 39

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 + 3x = 39 + -9

Combine like terms: 9 + -9 = 0
0 + 3x = 39 + -9
3x = 39 + -9

Combine like terms: 39 + -9 = 30
3x = 30

Divide each side by '3'.
x = 10

Simplifying
x = 10

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