0.3a+0.8(18-a)=9.9

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Solution for 0.3a+0.8(18-a)=9.9 equation:


Simplifying
0.3a + 0.8(18 + -1a) = 9.9
0.3a + (18 * 0.8 + -1a * 0.8) = 9.9
0.3a + (14.4 + -0.8a) = 9.9

Reorder the terms:
14.4 + 0.3a + -0.8a = 9.9

Combine like terms: 0.3a + -0.8a = -0.5a
14.4 + -0.5a = 9.9

Solving
14.4 + -0.5a = 9.9

Solving for variable 'a'.

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

Add '-14.4' to each side of the equation.
14.4 + -14.4 + -0.5a = 9.9 + -14.4

Combine like terms: 14.4 + -14.4 = 0.0
0.0 + -0.5a = 9.9 + -14.4
-0.5a = 9.9 + -14.4

Combine like terms: 9.9 + -14.4 = -4.5
-0.5a = -4.5

Divide each side by '-0.5'.
a = 9

Simplifying
a = 9

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