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The subtraction property of equality let's you say that if 5x+6=21, then ____ = 15
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The subtraction property of equality let's you say that if 5x+6=21, then ____ = 15

User Ganesh Nayak
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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. 
User Armamut
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