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

Solve by completing the square

x^2=5x+2

Any help is appreciated given an equation: a)solve for Y and b)find the slope and Y intercept

test problem 3y-5x=-12