exam Maths Puzzle Numerical Ability

Please can you help me solve x

(((3 + 3/x = 7)))

Thank you

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exam Other Question

how do you fit equations to data

example

1.) a long-distance telephone company advertised the following rates: "5 minutes (m) for just 85 cents (p)and 10 minutes for just $1. A record rotates 100 times in 3 minutes. If side A plays for 22 minutes and 30 seconds, how many times will it rotate?