80=100-5x

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Solution for 80=100-5x equation:


Simplifying
80 = 100 + -5x

Solving
80 = 100 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
80 + 5x = 100 + -5x + 5x

Combine like terms: -5x + 5x = 0
80 + 5x = 100 + 0
80 + 5x = 100

Add '-80' to each side of the equation.
80 + -80 + 5x = 100 + -80

Combine like terms: 80 + -80 = 0
0 + 5x = 100 + -80
5x = 100 + -80

Combine like terms: 100 + -80 = 20
5x = 20

Divide each side by '5'.
x = 4

Simplifying
x = 4

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