exam Maths Puzzle Numerical Ability

x-2/2-x+2/4=1/2
lcd=4 could you explain to me how to figure this out then check?
thank you!

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exam Other Question

Find the slopes, if they exist, of the lines containing these points.

(3, -5)(1,-1)
Ihave one more problem I have to do before I can go to bed. Could you please help me figure out this problem with square roots? Simplify as much as possible:
x (square root sign)96w^5 +6w^2(square root sign)24wx^2 Thanks!!