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

Write the equation of the line with given slope and y-intercept. Then graph each line using the slope and y-intercept.

Slope: -2: y-intercept: (0,4) Can someone help me step by step in reducing and simplifying this expression??
x^2+2x/(4x-3)/6x^3/(8x^2-2x-3)
Thanks