a+b=5+4

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Solution for a+b=5+4 equation: 


Simplifying
a + b = 5 + 4

Combine like terms: 5 + 4 = 9
a + b = 9

Solving
a + b = 9

Solving for variable 'a'.

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

Add '-1b' to each side of the equation.
a + b + -1b = 9 + -1b

Combine like terms: b + -1b = 0
a + 0 = 9 + -1b
a = 9 + -1b

Simplifying
a = 9 + -1b

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