70 times .9 is 63 so 90 minus 63 is27 so it was $27
Looks like the system is

We can eliminate
by taking




so that
, and



Substitute
into this last equation and solve for
:




Then



Plug these values into any one of the original equation to solve for
:




Hence the solution is x = 4, y = -3, and z = 2.
C. Action: Divide both sides by 3.
48.5 for all the rubber stamps