12a+20=81a-45+12a

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Solution for 12a+20=81a-45+12a equation:


Simplifying
12a + 20 = 81a + -45 + 12a

Reorder the terms:
20 + 12a = 81a + -45 + 12a

Reorder the terms:
20 + 12a = -45 + 81a + 12a

Combine like terms: 81a + 12a = 93a
20 + 12a = -45 + 93a

Solving
20 + 12a = -45 + 93a

Solving for variable 'a'.

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

Add '-93a' to each side of the equation.
20 + 12a + -93a = -45 + 93a + -93a

Combine like terms: 12a + -93a = -81a
20 + -81a = -45 + 93a + -93a

Combine like terms: 93a + -93a = 0
20 + -81a = -45 + 0
20 + -81a = -45

Add '-20' to each side of the equation.
20 + -20 + -81a = -45 + -20

Combine like terms: 20 + -20 = 0
0 + -81a = -45 + -20
-81a = -45 + -20

Combine like terms: -45 + -20 = -65
-81a = -65

Divide each side by '-81'.
a = 0.8024691358

Simplifying
a = 0.8024691358

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