.50x+.15(210-x)=.40(210)

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Solution for .50x+.15(210-x)=.40(210) equation:


Simplifying
0.50x + 0.15(210 + -1x) = 0.40(210)
0.50x + (210 * 0.15 + -1x * 0.15) = 0.40(210)
0.50x + (31.5 + -0.15x) = 0.40(210)

Reorder the terms:
31.5 + 0.50x + -0.15x = 0.40(210)

Combine like terms: 0.50x + -0.15x = 0.35x
31.5 + 0.35x = 0.40(210)

Multiply 0.40 * 210
31.5 + 0.35x = 84

Solving
31.5 + 0.35x = 84

Solving for variable 'x'.

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

Add '-31.5' to each side of the equation.
31.5 + -31.5 + 0.35x = 84 + -31.5

Combine like terms: 31.5 + -31.5 = 0.0
0.0 + 0.35x = 84 + -31.5
0.35x = 84 + -31.5

Combine like terms: 84 + -31.5 = 52.5
0.35x = 52.5

Divide each side by '0.35'.
x = 150

Simplifying
x = 150

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