.07x+.09(8000-x)=680

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Solution for .07x+.09(8000-x)=680 equation:


Simplifying
0.07x + 0.09(8000 + -1x) = 680
0.07x + (8000 * 0.09 + -1x * 0.09) = 680
0.07x + (720 + -0.09x) = 680

Reorder the terms:
720 + 0.07x + -0.09x = 680

Combine like terms: 0.07x + -0.09x = -0.02x
720 + -0.02x = 680

Solving
720 + -0.02x = 680

Solving for variable 'x'.

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

Add '-720' to each side of the equation.
720 + -720 + -0.02x = 680 + -720

Combine like terms: 720 + -720 = 0
0 + -0.02x = 680 + -720
-0.02x = 680 + -720

Combine like terms: 680 + -720 = -40
-0.02x = -40

Divide each side by '-0.02'.
x = 2000

Simplifying
x = 2000

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