I think it would have to be a problem with a negative number plus and positive number...
You have to move variables on one side and constants on the other
aby - b + b = c + b
aby = c + b
y = (c + b)/ab
Answer:
21500
Step-by-step explanation:
1). (2.8 * 10^4) - (6.5 * 10^3) = 28000 - 6500 = 21500