.80(c-100)=320

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Solution for .80(c-100)=320 equation:


Simplifying
0.80(c + -100) = 320

Reorder the terms:
0.80(-100 + c) = 320
(-100 * 0.80 + c * 0.80) = 320
(-80 + 0.80c) = 320

Solving
-80 + 0.80c = 320

Solving for variable 'c'.

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

Add '80' to each side of the equation.
-80 + 80 + 0.80c = 320 + 80

Combine like terms: -80 + 80 = 0
0 + 0.80c = 320 + 80
0.80c = 320 + 80

Combine like terms: 320 + 80 = 400
0.80c = 400

Divide each side by '0.80'.
c = 500

Simplifying
c = 500

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