2 1/4 / 3 =
9/4 / 3/1=
9*1 / 4*3=
9/12= 3/4= 0,75
28,64:(34,2+1,6)+52,16:(34,2-1,6)=28,64:35,8+52,16:32,6=0,8+1,6=2,4
1)7(х-5)=63
7х-35=63
7х=63+35
7х=98
х=14
2)24(х+15)=432
24х+360=432
24х=432-360
24х=72
х=3
24a3b(−38ab4c) = 72ab(-152abc)=-10944a^2*b^2*c