Case bought a 10-week-old pig that weighed 30 kg. At 18 weeks, the pig weighed 80 kg. The equation (18 − 10)x + 30 = 80 can be used to find the number of kg (x) the pig gained each week.
How many kilograms did the pig gain each week?
A: 5.75kg
B: 6.25kg
C: 6.75kg
D: 7.25kg
To find the number of kilograms the pig gained each week, we need to solve the equation:
(18 - 10)x + 30 = 80
First, simplify it by evaluating 18 - 10:
8x + 30 = 80
Next, subtract 30 from both sides of the equation:
8x = 50
Finally, divide both sides by 8 to solve for x:
x = 6.25
Therefore, the pig gained 6.25 kilograms each week.
The correct answer is B: 6.25kg