.12x+.15(900-x)=99

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Solution for .12x+.15(900-x)=99 equation:


Simplifying
0.12x + 0.15(900 + -1x) = 99
0.12x + (900 * 0.15 + -1x * 0.15) = 99
0.12x + (135 + -0.15x) = 99

Reorder the terms:
135 + 0.12x + -0.15x = 99

Combine like terms: 0.12x + -0.15x = -0.03x
135 + -0.03x = 99

Solving
135 + -0.03x = 99

Solving for variable 'x'.

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

Add '-135' to each side of the equation.
135 + -135 + -0.03x = 99 + -135

Combine like terms: 135 + -135 = 0
0 + -0.03x = 99 + -135
-0.03x = 99 + -135

Combine like terms: 99 + -135 = -36
-0.03x = -36

Divide each side by '-0.03'.
x = 1200

Simplifying
x = 1200

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