Question

determinati legitatea si aflati numarul omis -3(1-z)=4z-8
2,(5)t-2/3(t+1)=0
30
?
2z-3(4-z)=12+z
2/9(2-t)-4,(6)t=6

Answer 1

-3(1-z)=4z-8⇒
-3+3z=4z-8⇒
3z-4z=3-8⇒
-z=-5/-1=z=5