Question

AFLA NR.NAT X SI Y STIIND CA X SUPRA

3 = Y SUPRA 5 SI 10X-4Y =30.

Answer 1

x/3=y/5=>x=3y/5
Inlocuim 3y/5 in 10x-4y =30 => 10×3y/5-4y=30
2*3y-4y=30
6y-4y=30
2y=30
y=30÷2 =>y=15
x=3y/5 => x=3×15/5 => x=9