78=-x-x+12-x-x

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Solution for 78=-x-x+12-x-x equation:


Simplifying
78 = -1x + -1x + 12 + -1x + -1x

Reorder the terms:
78 = 12 + -1x + -1x + -1x + -1x

Combine like terms: -1x + -1x = -2x
78 = 12 + -2x + -1x + -1x

Combine like terms: -2x + -1x = -3x
78 = 12 + -3x + -1x

Combine like terms: -3x + -1x = -4x
78 = 12 + -4x

Solving
78 = 12 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
78 + 4x = 12 + -4x + 4x

Combine like terms: -4x + 4x = 0
78 + 4x = 12 + 0
78 + 4x = 12

Add '-78' to each side of the equation.
78 + -78 + 4x = 12 + -78

Combine like terms: 78 + -78 = 0
0 + 4x = 12 + -78
4x = 12 + -78

Combine like terms: 12 + -78 = -66
4x = -66

Divide each side by '4'.
x = -16.5

Simplifying
x = -16.5

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