Question

Suma a doua numere naturale este 361,iar diferenta lor este 25.Aflati cele doua numere.

Answer 1

a+b=361
a-b=25
⇒a=b+25

b+25+b=361
2b+25=361
2b=361-25
2b=336
b=336:2
b=168

a=b+25
a=168+25
a=193

Verificare:
a+b=361
193+168=361

a-b=25
193-168=25

Succes!

Answer 2

x+y=361
x-y=25
x=25+y
25+y+y=361
25+2y=361
2y=361-25
2y=336
y=168
x+168=361
x=361-168
x=193