3(-7-3x)=78

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


Simplifying
3(-7 + -3x) = 78
(-7 * 3 + -3x * 3) = 78
(-21 + -9x) = 78

Solving
-21 + -9x = 78

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + -9x = 78 + 21

Combine like terms: -21 + 21 = 0
0 + -9x = 78 + 21
-9x = 78 + 21

Combine like terms: 78 + 21 = 99
-9x = 99

Divide each side by '-9'.
x = -11

Simplifying
x = -11

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