Question

a carpenter bought 1 kg nails. After he had used 5/8 kg of it, he had 81 nails left. How many the total number of nails at first?

Answer 1

Answer:

216

Let the total no of nails be x

given

$\frac{5}{8} x =x - 81$

$5x - 8x = - 81 \times 8$

$- 3x = - 81 \times 8$

$x = 216$

Answer 2

Answer:

140

Step-by-step explanation:

1kg-5/8kg=81nails

625g=81nails

1000g =?(cross multiply)

let nails be x

625x=1000*81

(81000/625)=x

x=140

nails bought =140 nails