Respuesta :

successabiola2008

Answer:

a=20; b=-12

Step-by-step explanation:

if you just say (20,-12) then a can anything it can be 20 or it can be -12 so (a=20; b=-12) is an organized way of keeping it.

kayleighgoins

Answer:

3a − 2b = 84

3a = 36 − 2b

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