Question

Determina numerele naturale a si b stiind ca a·b=240 si a·(b+5)=300.

Answer 1

A.b = 240 , a.b+a5=300. , 240+a5=300, a5= 300_240, a5= 60, a = 60/5 = 12, daca a. b = 240 rezula 12 b = 240 rezulta b = 240:12 =20

Answer 2

a(b+5)=300
deschidem paranteza si obt a*b+a*5=300
240+5*a=300
5*a=300-240
5*a=60
a=60:5
a=12
a*b=240
12*b=240
b=240:12
b=20