Question

Suma a doua numere este 143‚iar diferenta lor este 35.
Care sunt numerele?

Answer 1

$a+b=143\\a-b=35 \to \fbox{a=35+b}\\****************\\\text{Inlocuim in relatie} \\ \\ 35+b+b=143\\35+2b=143\\2b=143-35\\2b=108\\b=108:2\\\fbox{b=54} \\ \\ a+54=143\\ a=143-54\\\fbox{a=89}$

Answer 2

35+b+b=143 35+2b=143 2b=143-35 2b=108. b=108:2. b=54 a+54=143 a=143-54. a=89