Question

classifique os seguintes sistemas lineares:
{x+y=6
x-y=8

Answer 1

x+y=6 = x=6-y= x=6-8+x= x=-2+x= x-x=-2= x=-1:-2=2
x-y=8 =-y=8+x= -y=8+2= -y=10= y=-1:10