-3b+ac=-4

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Solution for -3b+ac=-4 equation: 


Simplifying
-3b + ac = -4

Reorder the terms:
ac + -3b = -4

Solving
ac + -3b = -4

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.
ac + -3b + 3b = -4 + 3b

Combine like terms: -3b + 3b = 0
ac + 0 = -4 + 3b
ac = -4 + 3b

Divide each side by 'c'.
a = -4c-1 + 3bc-1

Simplifying
a = -4c-1 + 3bc-1

Reorder the terms:
a = 3bc-1 + -4c-1

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