(2 7/9z + 3 1/3)*3/5=1/6z+6 1/2
(25/9z+10/3)*3/5=1/6z+13/2
75/45z+30/15=1/6z+13/2
75/45z+1/6z=2+13/2=8 1/2
z(75/45+1/6)=8 1/2
z(15/9+1/6)=8 1/2
z(30/18+3/18)=8 1/2
33/18* z = 8 1/2
z=17/2 : 33/18
z=17/2 * 18/33 = 306/66=51/11= 4 7/11
75/45z+30/15=1/6z+13/2
5/3z-1/6z=13/2-2/1
3/2z=9/2
Z=9/2÷3/2
Z=9/2×2/3
Z=3
7=7
