78=-x+100

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Solution for 78=-x+100 equation:


Simplifying
78 = -1x + 100

Reorder the terms:
78 = 100 + -1x

Solving
78 = 100 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
78 + x = 100 + -1x + x

Combine like terms: -1x + x = 0
78 + x = 100 + 0
78 + x = 100

Add '-78' to each side of the equation.
78 + -78 + x = 100 + -78

Combine like terms: 78 + -78 = 0
0 + x = 100 + -78
x = 100 + -78

Combine like terms: 100 + -78 = 22
x = 22

Simplifying
x = 22

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