Question

[a+b,x+y,a-b, 2x-y]=[3,2,1,1] qual é o valor de a+x

Answer 1

$[a+b,x+y,a-b,2x-y]=[3,2,1,1]\\a+b=3\\x+y=2\\a-b=1\\2x-y=1\\2a=4\Rightarrow a=2\\3x=3\Rightarrow x=1\\\therefore a+x=2+1=3$