3(7x+9)=-78

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Solution for 3(7x+9)=-78 equation:


Simplifying
3(7x + 9) = -78

Reorder the terms:
3(9 + 7x) = -78
(9 * 3 + 7x * 3) = -78
(27 + 21x) = -78

Solving
27 + 21x = -78

Solving for variable 'x'.

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

Add '-27' to each side of the equation.
27 + -27 + 21x = -78 + -27

Combine like terms: 27 + -27 = 0
0 + 21x = -78 + -27
21x = -78 + -27

Combine like terms: -78 + -27 = -105
21x = -105

Divide each side by '21'.
x = -5

Simplifying
x = -5

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