.04x+.07(9000-x)=540

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Solution for .04x+.07(9000-x)=540 equation:


Simplifying
0.04x + 0.07(9000 + -1x) = 540
0.04x + (9000 * 0.07 + -1x * 0.07) = 540
0.04x + (630 + -0.07x) = 540

Reorder the terms:
630 + 0.04x + -0.07x = 540

Combine like terms: 0.04x + -0.07x = -0.03x
630 + -0.03x = 540

Solving
630 + -0.03x = 540

Solving for variable 'x'.

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

Add '-630' to each side of the equation.
630 + -630 + -0.03x = 540 + -630

Combine like terms: 630 + -630 = 0
0 + -0.03x = 540 + -630
-0.03x = 540 + -630

Combine like terms: 540 + -630 = -90
-0.03x = -90

Divide each side by '-0.03'.
x = 3000

Simplifying
x = 3000

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