Question

System of equations Y=10+2z y=38-5z

Answer 1

y = 2z + 10
y = -5z + 38

   2z + 10 = -5z + 38
+ 5z          + 5z
   7z + 10 = 38
         - 10  - 10
           7z = 28
            7      7
             z = 4
y = 2z + 10
y = 2(4) + 10
y = 8 + 10
y = 18
(z, y) = (4, 18)