book Maths Puzzle Numerical Ability

x - x + 3y - 7g =

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book Other Question

Sue brought a picnic table on sale for 50% off the original price. The store charged her 10% tax and her final cost was $22.00. What was the original price of the picnic table? if x=3 and x=-5, then form a quadratic equation. How can I do this to come out right? Thanks