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

Are lines L1 through (-2,1) and (0,3) and L2 through points (3,2) and (5,0) perpendicular? how do you determine linear equations and graph them?