2(13-a)=9

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Solution for 2(13-a)=9 equation:


Simplifying
2(13 + -1a) = 9
(13 * 2 + -1a * 2) = 9
(26 + -2a) = 9

Solving
26 + -2a = 9

Solving for variable 'a'.

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

Add '-26' to each side of the equation.
26 + -26 + -2a = 9 + -26

Combine like terms: 26 + -26 = 0
0 + -2a = 9 + -26
-2a = 9 + -26

Combine like terms: 9 + -26 = -17
-2a = -17

Divide each side by '-2'.
a = 8.5

Simplifying
a = 8.5

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