20-20a=-40+17a

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Solution for 20-20a=-40+17a equation:


Simplifying
20 + -20a = -40 + 17a

Solving
20 + -20a = -40 + 17a

Solving for variable 'a'.

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

Add '-17a' to each side of the equation.
20 + -20a + -17a = -40 + 17a + -17a

Combine like terms: -20a + -17a = -37a
20 + -37a = -40 + 17a + -17a

Combine like terms: 17a + -17a = 0
20 + -37a = -40 + 0
20 + -37a = -40

Add '-20' to each side of the equation.
20 + -20 + -37a = -40 + -20

Combine like terms: 20 + -20 = 0
0 + -37a = -40 + -20
-37a = -40 + -20

Combine like terms: -40 + -20 = -60
-37a = -60

Divide each side by '-37'.
a = 1.621621622

Simplifying
a = 1.621621622

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