Сложновато................
1. 7,6*3=22,8
2. 22,8+12,69=35,49
3.35,49/7=5,07
<span>(х - 1 2/9) + 3 7/3 = 4 4/9
</span><span>(х - 1 2/9)= 4 4/9-3 7/3
</span><span>(х - 1 2/9) =4 4/9-4 4/3
</span><span>(х - 1 2/9) =4 4/9-4 12/9
</span><span>(х - 1 2/9) =-8/9
х=-8/9+1 2/9
х=-8/9+11/9
х=3/9
х=1/3</span>