0.09a+0.12(100-a)=10.8

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Solution for 0.09a+0.12(100-a)=10.8 equation:


Simplifying
0.09a + 0.12(100 + -1a) = 10.8
0.09a + (100 * 0.12 + -1a * 0.12) = 10.8
0.09a + (12 + -0.12a) = 10.8

Reorder the terms:
12 + 0.09a + -0.12a = 10.8

Combine like terms: 0.09a + -0.12a = -0.03a
12 + -0.03a = 10.8

Solving
12 + -0.03a = 10.8

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + -0.03a = 10.8 + -12

Combine like terms: 12 + -12 = 0
0 + -0.03a = 10.8 + -12
-0.03a = 10.8 + -12

Combine like terms: 10.8 + -12 = -1.2
-0.03a = -1.2

Divide each side by '-0.03'.
a = 40

Simplifying
a = 40

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