1.5(x - 0.7) - 0.5 = 2.1(y + 1.7) - 0.2
c(y -x) = 11.7
consider the system of equations above, where c is a constant. For which value of c is (x,y) = (2.3, -0.7) a solution?
+8 Because the second equation is the only one with c we only have to worry about it. We start with:
c(y-x)=11.7
dividing by (y-x) we get;
c=11.7/(y-x)
with this in mind, we know that the solution occurs at (2.3, -0.7) so we can plug that point right in
c=11.7/((-.7)-(2.3))
Which gives us c = -3.9
