7a+9b-9a+4b=

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Solution for 7a+9b-9a+4b= equation:


Simplifying
7a + 9b + -9a + 4b = 0

Reorder the terms:
7a + -9a + 9b + 4b = 0

Combine like terms: 7a + -9a = -2a
-2a + 9b + 4b = 0

Combine like terms: 9b + 4b = 13b
-2a + 13b = 0

Solving
-2a + 13b = 0

Solving for variable 'a'.

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

Add '-13b' to each side of the equation.
-2a + 13b + -13b = 0 + -13b

Combine like terms: 13b + -13b = 0
-2a + 0 = 0 + -13b
-2a = 0 + -13b
Remove the zero:
-2a = -13b

Divide each side by '-2'.
a = 6.5b

Simplifying
a = 6.5b

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