Solve the simultaneous equations. 2x+5y=-4 and 7x+y=19

This can be solved using either substitution or elimination. I think this question is best approached by elimination.By elimination: Multiply the second equation by 5. The minus the first equation from the new second equation. This will give 33x=99. This can be solved as x=3. When substituting this into the first equation, we get 6+5y=-4, so 5y=-10 and y=-2.