Question

*resolva os sistemas:

X+2y=8
2x+y=1

2x+2y=10
X-y=-1

Answer 1

Explicação passo-a-passo:

×=8-2y

2.(8-2y)+y=1

16-4y+y=1

-4y+y=1-16

-3y=-15(-1)

3y=15

y=15/3

y=5

×=8-2y

×=8-2.5

×=8-10

×=-2

×=1+y

2.(1+y)+2y=10

2+2y+2y=10

4y=10-2

4y=8

y=8/4

y=2

×=1+y

×=1+2

×=3