exam Maths Puzzle Numerical Ability

the length of a recatangle is 2 feet less than 3 times the width. the sum of the length and width is 13 more than the width. find width.

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exam Other Question

w^3+5w^2-w=5

can someone please help. thank you in advance
HG and EF are bases, HI-height,

If HG=14, HI=2x+2, EF=4x+4, area=170, find x, HI, and EF.