8000+8000(.20-x)=7200

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Solution for 8000+8000(.20-x)=7200 equation:


Simplifying
8000 + 8000(0.20 + -1x) = 7200
8000 + (0.20 * 8000 + -1x * 8000) = 7200
8000 + (1600 + -8000x) = 7200

Combine like terms: 8000 + 1600 = 9600
9600 + -8000x = 7200

Solving
9600 + -8000x = 7200

Solving for variable 'x'.

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

Add '-9600' to each side of the equation.
9600 + -9600 + -8000x = 7200 + -9600

Combine like terms: 9600 + -9600 = 0
0 + -8000x = 7200 + -9600
-8000x = 7200 + -9600

Combine like terms: 7200 + -9600 = -2400
-8000x = -2400

Divide each side by '-8000'.
x = 0.3

Simplifying
x = 0.3

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