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