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Solve $-42r + 27c = -1167$ and $130r + 4c = 372$ for $r$.
in Grade 12 Maths by Diamond (39.7k points) | 20 views

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from 1, c=(42r-1167)/27

   subst into 2, r= -4((42r-1167)/27)

                       r= 75.45

  then c= (42(75.45) - 1167)/27

              = 74.14
by Silver Status (31.2k points)

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