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?

Guest Feb 27, 2017

#1**0 **

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

SirReginald
Feb 27, 2017