exam Maths Puzzle Numerical Ability

Please help.Solve each of the systems by substitution
5x-2y = -5
y - 5x = 3
Thank you.

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exam Other Question

r not equal to +/- 2, r^2-5r+6/r^2-4= Solve the following systems by graphing.

2x - y = 4
2x - y = 6

Thank you for your help!