Question

Resolva o sistema {A+B= -3 EMBAIXO => {6a + b+=7

Answer 1

A+B=-3 6
6a+b=7 1
6a+6b=-18
6a+b=7
-6a-6b=18
6a+b=7
7b=25 b=3

A+3=-3
A=-3-3
A=-6

A=-6 b=3