3(x+3)+3x=78

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Solution for 3(x+3)+3x=78 equation:


Simplifying
3(x + 3) + 3x = 78

Reorder the terms:
3(3 + x) + 3x = 78
(3 * 3 + x * 3) + 3x = 78
(9 + 3x) + 3x = 78

Combine like terms: 3x + 3x = 6x
9 + 6x = 78

Solving
9 + 6x = 78

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 + 6x = 78 + -9

Combine like terms: 9 + -9 = 0
0 + 6x = 78 + -9
6x = 78 + -9

Combine like terms: 78 + -9 = 69
6x = 69

Divide each side by '6'.
x = 11.5

Simplifying
x = 11.5

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