.9w+.15(3000-w)=.18(4000)

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Solution for .9w+.15(3000-w)=.18(4000) equation:


Simplifying
0.9w + 0.15(3000 + -1w) = 0.18(4000)
0.9w + (3000 * 0.15 + -1w * 0.15) = 0.18(4000)
0.9w + (450 + -0.15w) = 0.18(4000)

Reorder the terms:
450 + 0.9w + -0.15w = 0.18(4000)

Combine like terms: 0.9w + -0.15w = 0.75w
450 + 0.75w = 0.18(4000)

Multiply 0.18 * 4000
450 + 0.75w = 720

Solving
450 + 0.75w = 720

Solving for variable 'w'.

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

Add '-450' to each side of the equation.
450 + -450 + 0.75w = 720 + -450

Combine like terms: 450 + -450 = 0
0 + 0.75w = 720 + -450
0.75w = 720 + -450

Combine like terms: 720 + -450 = 270
0.75w = 270

Divide each side by '0.75'.
w = 360

Simplifying
w = 360

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