exam Maths Puzzle Numerical Ability

Tom walked to the meeting at 2 miles per hour and caught a ride home in an old truck at 10 miles per hour. How far was it to the meeting place if his total travel time was 18 hours?

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exam Other Question
m-2n=0
m+4n=30 How would you solve this equation, by either using the substitution method or the elimination method?

3x/4-y/3=7/6

x/2+2y/3=5/3