y + 2z = 44 12y+5z=205

y + 2z = 44

y+2z-2z=44-2z

y=44-2z

12y+5z=205 Sub in y and solve for z

12(44-2z)+5z=205

528-24z+5z=205

528-19z=205

528-528-19z=205-528

-19z=-323

-19z/-19=-323/-19

z=17

y=44-2z

y=44-2(17)

y=44-34

y=10