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Best Answer
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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