20-a=3y-1.8

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Solution for 20-a=3y-1.8 equation:


Simplifying
20 + -1a = 3y + -1.8

Reorder the terms:
20 + -1a = -1.8 + 3y

Solving
20 + -1a = -1.8 + 3y

Solving for variable 'a'.

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

Add '-20' to each side of the equation.
20 + -20 + -1a = -1.8 + -20 + 3y

Combine like terms: 20 + -20 = 0
0 + -1a = -1.8 + -20 + 3y
-1a = -1.8 + -20 + 3y

Combine like terms: -1.8 + -20 = -21.8
-1a = -21.8 + 3y

Divide each side by '-1'.
a = 21.8 + -3y

Simplifying
a = 21.8 + -3y

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