a: 3
b: 52
c: 29
d: 7
e: 33
g: 32
h: 46
i : 801
9:x=3
x=9:3
x=3
vậy x=3
x+25=77
x=77-25
x=52
vậy x=52
67-x=38
x=67-38
x=29
vậy x=29
5×x=35
x=35:5
x=7
vậy x=7
66+x=41+58
66+x=99
x=99-66
x=33
vậy x=33
28+x=30×2
28+x=60
x=60-28
x=32
vậy x=32
54+x=50+50
54+x=100
x=100-54
x=46
vậy x=46
108+x=800+109
108+x=909
x=909-108
x=801
vậy x=801
dấu . là nhân nhé
\(a,9:x=3\)\(< =>9:3=x< =>x=3\)
\(b,x+25=77\)
\(< =>x=77-25=49\)
\(c,67-x=38\)
\(< =>67-38=x\)
\(< =>x=29\)
\(d,5.x=35\)\(< =>x=35:5\)
\(< =>x=7\)
a] 9:x=3
x=9:3
x=3
b]x+25=77
x=77-25
z=52
c]67-x=38
x=67-38
x=29
d]5xX=35
x=35:5
x=7
e]66+x=41+58
66+x=99
x=99-66
x=33
g]28+x=30x2
28+x=60
x=60-28
x=32
h]54+x=50+50
54+x=100
x=100-54
x=46
i]108+x=800+109
108+x=909
x=909-108
x=801
3, 52, 29, 7, 33, 32, 46, 801
a) 3
b) 52
c) 29
d) 7
e) 33
g) 32
h)46
i) 801
