9-20=23-13a

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Solution for 9-20=23-13a equation:


Simplifying
9 + -20 = 23 + -13a

Combine like terms: 9 + -20 = -11
-11 = 23 + -13a

Solving
-11 = 23 + -13a

Solving for variable 'a'.

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

Add '13a' to each side of the equation.
-11 + 13a = 23 + -13a + 13a

Combine like terms: -13a + 13a = 0
-11 + 13a = 23 + 0
-11 + 13a = 23

Add '11' to each side of the equation.
-11 + 11 + 13a = 23 + 11

Combine like terms: -11 + 11 = 0
0 + 13a = 23 + 11
13a = 23 + 11

Combine like terms: 23 + 11 = 34
13a = 34

Divide each side by '13'.
a = 2.615384615

Simplifying
a = 2.615384615

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