Question

2. A farmer bought 85 kilograms of fertilizer in 12 bags. Some are 5kg bags. The rest are 10kg bags. How many 5kg bags did he buy?

Answer 1

let number of 5 kg bags = x

then number of 10 kg bags = 12-x

total kg = 85 kgs

therefore 5x+10(12-x) = 85

5x+120-10x = 85

ie x = 7 bags