1)7.6/x=19/9:22/9
19/9:22/9=19/9*9/22=19/22
7.6/x=19/22
x=7.6/19/22=76/10:19/22=76/10*22/19=1672/190=8.8
2)4/24x-3.28=9/24x-4.11
13/24x=-4.11+3.28
13/24x=-0.83
x=-0.83:13/24=-83/100:13/24=-83/100*24/13=-1992/1300=-996/650=-498/325
3)0.4x-3.6=0.7+0.3x+0.6
0.7x=1.3+3.6
0.7x=4.9
x=4.9:0.7=7