Question

Resolva os sistemas de equações:
{ 5x+8y-34=0
7x-y=11

Answer 1

Resposta:

5x+8y-34=0

5x+8y=34

7x-y=11

-y=11-7x (-1)

y=-11+7x

5x+8y=-34

5x+8(-11+7x)=34

5x-88+56x=34

5x+56x=88+34

61x=122

x=122/61

x=2

y=-11+7x

y=-11+7.2

y=-11+14

y=3