exam Maths Puzzle Numerical Ability

four times a number is three times the difference between thirty-five and the number. find the number. thanks

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exam Other Question

I have 5 pounds of mixed nuts that cost $30. I want to add peanuts that cost 1.50 per lb and cashews that cost 4.50 per lb. to come up with 50 lb mixture that cost 2.90 per lb. H A square and a rectangle have the same area. The length of the rectangle is 8 in. more than a side of the square, and the width of the rectangle is 4 in. less than a side of the square. Find the length of a side of the square.