Does anyone know how to do this type of shape/figure

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

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Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.