tmcginn tmcginn
  • 04-09-2019
  • Mathematics
contestada

please see attachment


this makes no sense to me!


(-7) + (2) = -5 in my world

- oh woops - its (-7) - (2) = -9 which does makes sense

please see attachmentthis makes no sense to me7 2 5 in my world oh woops its 7 2 9 which does makes sense class=

Respuesta :

kalq
kalq kalq
  • 04-09-2019
it’s all about substitution. you need to substituse (1,5) so 1 is x and 5 is y. you put it as 7(1) - 2(5) = -5 and you solve
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