exam Maths Puzzle Numerical Ability

Solve each system by substitution:
5x - 2y = -5
y - 5x = 3

Any help with this problem would be appreciated. I am having problems with the substitution.

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exam Other Question

y=1/3x+1/2

Determine if the lines are parallel, perpendicular, or neither. A small city park consists of a rectangular lawn surrounded on all sides by a 330m sq. border of flowers 2.5m wide. Find the area of the lawn if the entire park is 5m longer than it is wide.