13a=7a-9b

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Solution for 13a=7a-9b equation: 


Simplifying
13a = 7a + -9b

Solving
13a = 7a + -9b

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
13a + -7a = 7a + -7a + -9b

Combine like terms: 13a + -7a = 6a
6a = 7a + -7a + -9b

Combine like terms: 7a + -7a = 0
6a = 0 + -9b
6a = -9b

Divide each side by '6'.
a = -1.5b

Simplifying
a = -1.5b

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