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a) 7210 : X + 356 = 391 b) 9000 - 120 x X = 4680
7210 : X = 391 - 356 120 x X = 9000 - 4680
7210 : X = 35 120 x X = 4320
X = 7210 : 35 X = 4320 : 120
X = 206 X = 36
c) 1230 - X - 108 = 870 d) 108 720 : X = 151 x 2
X - 108 = 1230 - 870 108 720 : X = 302
X - 108 = 360 X = 108 720 : 302
X = 360 + 108 X = 360
X = 468
/HT\
a) 7210 : X + 356 = 391
\(7210:x=391-356\)
\(7210:x=35\)
\(x=7210:35\)
\(x=206\)
b) 9000 - 120 x X = 4680
\(120.x=9000-4680\)
\(120.x=4320\)
\(x=4320:120\)
\(x=36\)
c) 1230 - X - 108 = 870
\(1230-x=870+108\)
\(x=1230-978\)
\(x=252\)
d) 108 720 : X = 151 x 2
\(x=108720:151.2\)
\(x=720.2\)
\(x=1440\)
("." là dấu nhân)
(X + 3054) : 5 = 1230
X + 3054 = 1230 x 5
X + 3054 = 6150
X = 6150 - 3054
X = 3096
a)1440:40 =36
b)205 x 13 =2665
c)2057
d)36 x 25 x 4 =3600
18 x 24 :9 =48
41 x 2 x 8 x 5 =3280
215 x 86 + 215 x 14 =21500
53 x 128 - 43 x 128 =1408
2/3 x 4/7 =8/21
2 x 3 x 4 / 2 x 3 x 4 x 5 =24/120
1 x 2 x 3 x 4 / 5 x 6 x 7 x 8=24/1680
x : 7/11 = 22
x =22 x 7/11
x =14
2/7 * x =2/3
x = 2/7 :2/3
x = 20/21
x3 + x2 + x4 + x = 1230
\(\Rightarrow\)x10 = 1230
\(\Rightarrow\)x = 1230 : 10
\(\Rightarrow\)x = 123
vậy x = 123
x * 3 + x * 2 + x * 4 + x = 1230
x * 3 + x* 2 + x * 4 + x * 1 =1230
x* ( 3 + 2 + 4 + 1 ) = 1230
x * 10 = 1230
x = 1230 : 10
x = 123
Xx3+Xx2+Xx4+Xx1=1230
Xx(3+2+4+1)=1230
Xx10=1230
X=123
\(x\cdot3+x\cdot2+x\cdot4+x=1230\)\
\(x\cdot3+x\cdot2+x\cdot4+x\cdot1=1230\)
\(x\cdot\left(3+2+4+1\right)=1230\)
\(x\cdot10=1230\)
\(x=1230\div10\)
\(\Rightarrow x=123\)
x . 3 + x . 2 + x . 4 + x = 1230
x . 3 + x . 2 + x . 4 + x . 1 = 1230
x . ( 3 + 2 + 4 + 1 )=1230
x . 10 = 1230
=> x = 123
X x 3 + X x 2 + X x 4 + X = 1230
X x 3 + X x 2 + X x 4 + X x 1 = 1230
X x ( 3 + 2 + 4 +1 ) = 1230
X x 10 = 1230
X = 1230 : 10
X = 123
câu trả lời là 123
x .3 + x.2 + x.4 +x=1230
x . (3+2+4+1) =1230
x . 10 =1230
x =1230:10
x =123
vậy ....
t k mik
hok tốt
X x 3 + X x 2 + X x 4 + X
= X x 3 + X x 2 + X x 4 + X x 1
= X x ( 3 + 4 + 5 + 1) = 1230
= X x 10 =1230
X = 1230 :10
X = 123
X x 3 + X x 2 + X x 4 + X = 1230
X x ( 3 + 2 + 4 + 1 ) = 1230
X x 10 = 1230
X = 1230 : 10
X = 123
Vậy X = 123
X x 3 + X x 2 + X x 4 + X = 1230
X x 3 + X x 2 + X x 4 + X = 1230
X x 3 + X x 2 + X x 4 + X x 1 = 1230
X x ( 3 + 2 + 4 + 1 ) = 1230
X x 10 = 1230
X = 1230 : 10
X = 123
Trả lời:
\(x\cdot3+x\cdot2+x\cdot4+x=1230\)
\(\Rightarrow\) \(x\cdot3+x\cdot2+x\cdot4+x\cdot1=1230\)
\(\Rightarrow\) \(x\left(3+2+4+1\right)=1230\)
\(\Rightarrow\) \(x\cdot10=1230\)
\(\Rightarrow\) \(x=1230:10\)
\(\Rightarrow\) \(x=123\)
Hc tốt #
X * 3 + X * 2 + X * 4 + X = 1230
X * 3 + X * 2 + X * 4 + X * 1 = 1230
X * ( 3 + 2 + 4 + 1 ) = 1230
X * 10 = 1230
X = 1230 : 10
X = 123
Xx3+Xx2+Xx4+X=1230
Xx3+Xx2+Xx4+Xx1=1230
Xx (3+2+4+1)=1230
Xx10=1230
X=1230:10
X=123
hok tốt
X x 3 + X x 2 + X x 4+ X = 1230
x*(3+2+4+1)=1230
x*10=1230
x*123