Andyyyy11 Andyyyy11
  • 05-10-2017
  • Mathematics
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The subtraction property of equality let's you say that if 5x+6=21, then ____ = 15

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MathGeek289
MathGeek289 MathGeek289
  • 05-10-2017
The answer is 5x = 15. All that you have to do is find out what changed the left side to 15, this case is the 6 using the subtraction property of equality. 
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