Question

Suma a doua numere este 10,iar dublul diferentei lor este 12. Afla cele doua numere.

Answer 1

a+b=10
2(a-b)=12
a-b=12:2
a-b=6
a=b+6
a+b=10
b+b+6=10
2b=10-6
2b=4
b=4/2
b=2
a=b+6
a=2+6
a=8

Answer 2

a+b=10
ax2-bx2=12 /:2
a-b=6→a=b+6
_____________
? a,b
_____________
a: \_\+6. }10
b: \_\
2 p.e+6=10
2 p.e=10-6
2 p.e=4
1 p.e=4:2
1 p.e=2 (b)
2+6=8 (a)
Verificare:
8-2=6 (A)
8+2=10 (A)
Răspuns:
a=8
b=2
Succes !