Question

please answer with full explanation of coming question

Q1. Divide 34 into two parts, such that 4/7 of one part = 2/5 of the other

Answer 1

let the parts be x and y

so
x+y=34

other equation will be...

$\frac{4}{7} x = \frac{2}{5} y \\ x = \frac{7}{10} y$
now put x=7/10y in eq.1

$\frac{7}{10} y + y = 34 \\ 17y = 340 \\ y = 20$
so x=14