tlalectlimixtli tlalectlimixtli
  • 15-11-2014
  • Mathematics
contestada

2a=8
A+b=2
Substitution method

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Jelena
Jelena Jelena
  • 15-11-2014
2a=8 /:2
a=4

a+b=2
4+b=2
b=2-4
b=-2

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