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2m - 9 = 12

→ 2m - 9 + 9 = 12 + 9

→ 2m = 21

→ 2m ÷ 2 = 21 ÷ 2

→ m = 101/2 = 10.5
2m - 9 = 12

Add 9 to each side of the equation:

2m = 21

Divide each side by 2 :

m = 10.5

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Q: What is m if 2m-9 equals 12?
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