Question

please solve my question i

Answer 1

let the weight of metal be x
5x/9=7
x=7×9/5
2/7 of metal=2/7×7×9/5
18/5kg

Answer 2

let the mass of metal X kg
5/9 of x=7
5x/9=7
5x=63
x=63/5

2/7 of x
2/7*63/5
126/35
3.6
2/7 of metal piece has 3.6kg mass
hope helpful to you...