KendraMontjoy996
KendraMontjoy996 KendraMontjoy996
  • 17-06-2015
  • Mathematics
contestada

Solve the inequality 21 - z < 19

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Christinecoconnor
Christinecoconnor Christinecoconnor
  • 17-06-2015


You need to isolate z, so first subtract 21 from both sides so you have:

-z<-2

Multiply both sides by -1 so z is positive (when a negative number is multiplied or divided in an inequality, the < or > sign flips):

z>2

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