a+b-9=4

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Solution for a+b-9=4 equation:


Simplifying
a + b + -9 = 4

Reorder the terms:
-9 + a + b = 4

Solving
-9 + a + b = 4

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + a + 9 + b = 4 + 9

Reorder the terms:
-9 + 9 + a + b = 4 + 9

Combine like terms: -9 + 9 = 0
0 + a + b = 4 + 9
a + b = 4 + 9

Combine like terms: 4 + 9 = 13
a + b = 13

Add '-1b' to each side of the equation.
a + b + -1b = 13 + -1b

Combine like terms: b + -1b = 0
a + 0 = 13 + -1b
a = 13 + -1b

Simplifying
a = 13 + -1b

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