0.04x+0.07(10000-x)=420

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Solution for 0.04x+0.07(10000-x)=420 equation: 


Simplifying
0.04x + 0.07(10000 + -1x) = 420
0.04x + (10000 * 0.07 + -1x * 0.07) = 420
0.04x + (700 + -0.07x) = 420

Reorder the terms:
700 + 0.04x + -0.07x = 420

Combine like terms: 0.04x + -0.07x = -0.03x
700 + -0.03x = 420

Solving
700 + -0.03x = 420

Solving for variable 'x'.

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

Add '-700' to each side of the equation.
700 + -700 + -0.03x = 420 + -700

Combine like terms: 700 + -700 = 0
0 + -0.03x = 420 + -700
-0.03x = 420 + -700

Combine like terms: 420 + -700 = -280
-0.03x = -280

Divide each side by '-0.03'.
x = 9333.333333

Simplifying
x = 9333.333333

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