Question

01) Resolva os sistemas
A) X+y=10
X-y=5

B) 2X+y=-1
X+2y=1

C) X-y=2
2x+y=7

D)X+y=11
X-y=3

E) X+y=6
2x+y=6

F) X+y=2
3×+2y=6

Answer 1

Resolvendo a letra B pq acredito que através dela tds serão resolvidas:

2x+y=-1

x+2y=1

y=-1-2x

x+2y=1x+2(-1-2x)=1

x=-1

y=-1-2x(-1)

y=1

(x,y)=(-1,1)