nicholecobb nicholecobb
  • 24-02-2017
  • Mathematics
contestada

21 is greater than or equal to 3(a-7) +9

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RachelRD
RachelRD RachelRD
  • 24-02-2017
21≥3(a-7) +9
first, just solve it like a normal equation
Distribute
21≥3a-21+9
Combine numbers
21≥3a-12
Solve like equation
33≥3a
11≥a
"a" has to be less than or equal to 11 for the inequality to be true
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