Question

A soma de dois números é -2 e a diferença -22. Quais são os dois numeros

Answer 1

[A+B=-2     ------>   A=-2-B

[A-B=-22

SUBSTITUINDO A<<<<   A-B=-22

                                         -2-B-B=-22

                                         -2B=-22+2

                                            B=-20/-2

                                           B=10

SUBSTITUINDO  B>>>>>  A-B=-22

                                           A-10=-22

                                           A=-12