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10-10-2022
Mathematics

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What Property’s are used in each step?
Step 1 5x+9+5x+12=(5x+9)+(5x+12)
Step 2 = 5x+(9 +5x)+12
Step 3 = 5x+(5x+9)+12
Step 4 =(5x+5x)+(9+12)
Step 5 = (5 + 5)x+ (9 + 12)
Step 6 = 10x + 21

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