78=-9-3(-56+12x)

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Solution for 78=-9-3(-56+12x) equation: 


Simplifying
78 = -9 + -3(-56 + 12x)
78 = -9 + (-56 * -3 + 12x * -3)
78 = -9 + (168 + -36x)

Combine like terms: -9 + 168 = 159
78 = 159 + -36x

Solving
78 = 159 + -36x

Solving for variable 'x'.

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

Add '36x' to each side of the equation.
78 + 36x = 159 + -36x + 36x

Combine like terms: -36x + 36x = 0
78 + 36x = 159 + 0
78 + 36x = 159

Add '-78' to each side of the equation.
78 + -78 + 36x = 159 + -78

Combine like terms: 78 + -78 = 0
0 + 36x = 159 + -78
36x = 159 + -78

Combine like terms: 159 + -78 = 81
36x = 81

Divide each side by '36'.
x = 2.25

Simplifying
x = 2.25

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