exam Maths Puzzle Numerical Ability

I do not understand how to solve this problem. Can you help me? 4x+3=piex-2

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exam Other Question

Solve: 4^w=1/64 70) Cost of Material. A rectangular box with volume 320ft cubed is built with a square base and top. The cost is $1.50/ft.squared for the bottom, $2.50/ft.squared for the sides, and $1/ft.squared for the top. Let x=the length of the base, in feet.