Question

trei copii au cules 100 de ciuperci . al 2 lea a cules cu 15 mai multe decat primul, dar cu 10 mai putin decat al 3 lea. sa se afle cate ciuperci a cules fiecare copil.

Answer 1

Notam fiecare cupil cu literele a, b si respectiv c.
a+b+c=100
b=a+15
b=c-10
=>c=b+10
=>c=a+15+10=a+25
=>a+a+15+a+25=100=>3a+40=100=>3a=60=>a=20
=>b=20+15=35
=>c=35+10=45

Answer 2

a+b+c=100
b=a+15
b=c-10 rezulta ca c=b+10
a+a+15+a+15+10=100
3a+40=100
3a=100-40
3a=60
a=60:3
a=20
b=a+15=20+15
b=35
c=b+10=35+10
c=45