-7х * 2 - 3х = 0
-10х = -2
х = -2 : (-10)
х = 0,2
72:15=4,8 64:12=5,(3)90:40=2,2565:25=2,6165:60=2,75382:40=9,55690:200=3,45830:300=2,7(6)2290:700=3,2(714285)5020:800=6,27517552:45=390,0(4)<span>79179:39=<span>2030.23076923</span>
</span>
4*4+4:4=17
4*4-4:4=15
(4*4-4):4=3
(4+4+4)*4=48
4*4*4-4=60
4*4*4+4=68