exam Maths Puzzle Numerical Ability

Please show me step by step how to do the following equation. I am having trouble remembering how to put the y on left.
2y-x=3
x=3y-5
Also Section 7.1, question 82:Tickets sold

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exam Other Question

how can i create a rectangle with two sides that each measure 2 centimeters, and whose area is exactly 13 cm2? Find the reference number for each value of t.

a. if t=2pi/3 _
the reference number is t =

b if t= 3pi/4 _
the reference number is t =

2.