hugodantas14
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os sistema {x+y=20                    {ax+2y=32

                         {x-y=4       e           {3x-by=20 sao equivalentes calcule a e b ?

 

Resposta :

Shouky

x + y = 20

x - y = 4

_____________

2x=24

x = 12

 

x+y =20

12+y=20

y = 8

 

ax+2y=32

12a+2.8=32

12a+16=32

12a=16

a=16/12

a = 4/3

 

3x-by=20

3.12-8b=20

36-8b=20

8b=36-20

8b=16

b=16/8

b = 2

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