Respuesta :

Answer:

a=-12

b=15

c=12

d=-12

Step-by-step explanation:

3(-4)=a

b(-3)=12

c=12

d(24)=12

3(-4)=a

-12=a

a=-12

b(-3)=12

-3b=12

b=12+3

b=15

c= 12

d(24)=12

24d=12

d=12-24

d=-12

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