3(x-3)+x=78

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


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

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

Combine like terms: 3x + x = 4x
-9 + 4x = 78

Solving
-9 + 4x = 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 + 4x = 78 + 9

Combine like terms: -9 + 9 = 0
0 + 4x = 78 + 9
4x = 78 + 9

Combine like terms: 78 + 9 = 87
4x = 87

Divide each side by '4'.
x = 21.75

Simplifying
x = 21.75

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