Question

suma a doua numere este 343 iar diferenta lor este 129.Care sunt cele doua numere?

Answer 1

$a+b=343 \\a-b=129 \to \fbox{a=129+b} \\*****************\\ \text{Inlocuim in relatie } \\ 129+b+b=343\\129+2b=343\\2b=343-129\\2b=214\\ b=214:2\\\fbox{b=107} \\ \\ a+107=343\\a=343-107\\\fbox{a=236}$

Answer 2

a+b=343
a-b=129
a+b+a-b=343+129
2a=472
a=236
236+b=343
b=343-236
b=107