2/3=?/10; what does ? mean

2/3=?/10. what number is the varieble ?.
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2/3=?/10; what does ? mean
? means x

2/3=x/10
2/3=x/10
20/30=x/10
20/30=3x/30

3x=20
x=20/3
x=6 2/3
by Level 5 User (14.8k points)

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