book Maths Puzzle Numerical Ability

Write solution as a coordinate. Then graph on the graph provided and label the solution. Label the x and y axis for each problem.

x+3y=-5
2x-3y=8

PLEASE HELP!

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book Other Question

Sliced turkey cost $3.20 per pound. Roast beef cost twice as much, & ground beef cost half as much as the turkey. Find the price of 7.5 pounds of ground beef.
-------------------- It is possible for a triangle to be which of the following?

A) both isosceles and right
B) both equilateral and equiangular
C) both scalene and acute
D) both obtuse and equilateral