Math
Solve for both systems 7x+13z=209 and 2x + 6z = 94

Asked by
AnneS2
Last updated by
anonymous
2x + 6z = 94
2x + 6z-6z = 94-6z
2x= 94-6z
2x/2= 94-6z/2
x=47-3z
7x+13z=209
7(47-3z)+13z=209
7(47) (7)(-3z)+13z=209
329-21z+13z=209
329-8z=209
329-8z-329=209-329
-8z=-120
-8z/-8=-120/-8
z=15
x=47-3z
x=47-3(15)
x=47-45=2