10a=7a+a-9b

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Solution for 10a=7a+a-9b equation: 


Simplifying
10a = 7a + a + -9b

Combine like terms: 7a + a = 8a
10a = 8a + -9b

Solving
10a = 8a + -9b

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
10a + -8a = 8a + -8a + -9b

Combine like terms: 10a + -8a = 2a
2a = 8a + -8a + -9b

Combine like terms: 8a + -8a = 0
2a = 0 + -9b
2a = -9b

Divide each side by '2'.
a = -4.5b

Simplifying
a = -4.5b

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