On the challenges question for : draw the reflection line of y=x-1 in the line x=2 and question b of work out the equation of the reflected line + answer explain aswell.

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Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?