3(20+x)=99

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Solution for 3(20+x)=99 equation: 


Simplifying
3(20 + x) = 99
(20 * 3 + x * 3) = 99
(60 + 3x) = 99

Solving
60 + 3x = 99

Solving for variable 'x'.

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

Add '-60' to each side of the equation.
60 + -60 + 3x = 99 + -60

Combine like terms: 60 + -60 = 0
0 + 3x = 99 + -60
3x = 99 + -60

Combine like terms: 99 + -60 = 39
3x = 39

Divide each side by '3'.
x = 13

Simplifying
x = 13

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