Answer:
B = A - 4C/3
is your answer
Explanation:
To find B you would have to isolate B from the equation itself,
3B + 4C = A
3B = -4C + A
then individualize 3 from B and transfer it as a denominator under - 4C + A
B = - 4C + A/3
then flip around the order to make it systematically correct.
B = A - 4C/3
I hope this helped you!