Question

Obtenha os valores de a, b, c e d do sistema abaixo:

Answer 1

a+b-3c+d=1

-b+7c-d=2

10c-d=-3

3d=39

3d=39

d=39/3

d=13

10c-d=-3

10c-13=-3

10c=10

c=10/10

c=1

-b+7c-d=2

-b+7×(1)-(13)=2

-b=8

b=-8

a+b-3c+d=1

a+(-8)-3×(1)+13=1

a-11+13=1

a=12-13

a=-1