a)45*x+28=568 b)648-34*x=444 c)x/24=264(dư 13)
=>45*x=568-28 34*x=648-444 => x:24=251
=>45*x=540 34*x=204 =>x=251*24
=>x=540:45 x=204:34 =>x=6024
=>x=12 x=6
a,45*x+28=568
45*x =568-28
45*x =540
x =540:45
x =12
b,648-34*x=444
34*x =648-444
34*x =204
x =204:34
x =6
c,x:24=264 dư 13
x =264*24 +13
x=6349