0.45x+.05(18-x)=.10(81)

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Solution for 0.45x+.05(18-x)=.10(81) equation:


Simplifying
0.45x + 0.05(18 + -1x) = 0.10(81)
0.45x + (18 * 0.05 + -1x * 0.05) = 0.10(81)
0.45x + (0.9 + -0.05x) = 0.10(81)

Reorder the terms:
0.9 + 0.45x + -0.05x = 0.10(81)

Combine like terms: 0.45x + -0.05x = 0.4x
0.9 + 0.4x = 0.10(81)

Multiply 0.10 * 81
0.9 + 0.4x = 8.1

Solving
0.9 + 0.4x = 8.1

Solving for variable 'x'.

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

Add '-0.9' to each side of the equation.
0.9 + -0.9 + 0.4x = 8.1 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + 0.4x = 8.1 + -0.9
0.4x = 8.1 + -0.9

Combine like terms: 8.1 + -0.9 = 7.2
0.4x = 7.2

Divide each side by '0.4'.
x = 18

Simplifying
x = 18

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