exam Maths Puzzle Numerical Ability

do I multiply entire equation by lcd even though it is only a subtraction question?

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exam Other Question

Please help.

Which of the ordered pairs is a solution for the equation 2x-4y=8

(A) (-4,-2). (B) (0,-2), (C) (-4,0) or (D) (0,2)

Thanks
JMS You have a part time job at The Nut House which sells peanuts for $2 a pound and cashews for $5 a pound. During one day the sales for both peanuts and cashews totaled $40.00.

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