Question 79150
solving the first equation for y gives y=-1-2x ... substituting into the second equation gives x^2=4-1-2x or x^2+2x-3=0


factoring gives (x+3)(x-1)=0 so x=-3 and x=1 ... from the first equation; when x=-3, y=5 and when x=1, y=-3


these numbers check with the second equation