-3a+b+9a-4b=

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Solution for -3a+b+9a-4b= equation:


Simplifying
-3a + b + 9a + -4b = 0

Reorder the terms:
-3a + 9a + b + -4b = 0

Combine like terms: -3a + 9a = 6a
6a + b + -4b = 0

Combine like terms: b + -4b = -3b
6a + -3b = 0

Solving
6a + -3b = 0

Solving for variable 'a'.

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

Add '3b' to each side of the equation.
6a + -3b + 3b = 0 + 3b

Combine like terms: -3b + 3b = 0
6a + 0 = 0 + 3b
6a = 0 + 3b
Remove the zero:
6a = 3b

Divide each side by '6'.
a = 0.5b

Simplifying
a = 0.5b

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