exam Maths Puzzle Numerical Ability

4X+3=-3+2X+14-3

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exam Other Question

A store sells regular coffe for $4 a pound and a gourmet coffee for $7 a pound. To get rid of 40 pounds of the gourmet coffee, the shopkeeper plans to make a gourmet blend to sell for $5 a pound. How many pounds of regular coffee should be used? What is the equation of the line that passes through the point (-1,7) and is parallel to the line y=-2x-1?