angellovesmovies angellovesmovies
  • 13-01-2015
  • Mathematics
Answered

what is y=x-7 3x-3y=21 by solving by substitution



Answer :

Johnathanochoa6 Johnathanochoa6
  • 13-01-2015
Ok first you really have plug in x-7 into y
So it turns into 3x-3x-21=21 I'm pretty sure you can figure the rest
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