exam Maths Puzzle Numerical Ability

Please solve. |7X - 14| < 7

I tried and got X < 3 or X > 1

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exam Other Question

a boat goes upstream 30 miles and downstream 44 miles in 10 hours.the next day it goes upstream 40 miles and downstream 55 miles in 13 hours.what is the average speed of the boat and the stream? A credit card, a piece of cardboard and a ruler are all examles of what geometric tool?