Name: Roger Hornbaker
Who is asking: Student
These equations are set up to make them easy for you to solve. Notice, for example in the first pair of equations the coefficient of y in the first equation is +1 and the coefficient of y in the second equation is -1. If you add the two equations you get
whic simplifies to
(The fact that the coefficioents of y are +1 and -1 made them cancel out when the equations were added.)
dividing both sides by 8 gives x = 1. Now you can substitute x = 1 into either of the equations you started with to find y.