exam Maths Puzzle Numerical Ability

|x-7|
----- < 4
3

x-7 over 3 is in absolute value form

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exam Other Question

solve for the variable indicated

6x-10y=3

solve for y YESTERDAY YOU BOUGHT A HUGE WATERMELON THAT WEIGHS 100 POUNDS. A WATERMELON IS 90% WATER. YOU LEFT IT OUTSIDE IN THE HOT SUN. SOME OF THE WATER EVAPORATED, SO IT IS NOW 80% WATER. HOW MUCH DOES THE WATERMELON WEIGH NOW?