exam Maths Puzzle Numerical Ability

Can you help me solve this problem?

(2/5w-10)-(3/2w-4)

I factored, found the LCD and arrived at the answer -11/10(w-2)
Is this correct?

Thanks for your help!

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exam Other Question

A cliff diver in Acapulco, Mexico, dives from about 17m above the water. The diver's height above the water h, in metres, after t seconds is modelled by
h= -4.9t squared + 1.5t + If u = (3,-2,3), v = (3,-2,1) and 3x + u = 5v - x, then find x