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A) AB x X = ABAB => X = ABAB : AB = 101
B) X x A = AA => X = AA : A = 11
C) ABC x X = ABCABC => X = ABCABC : ABC = 1001
D) AB0AB0 : X = AB => X = AB0AB0 : AB = 10010
Các câu sau bạn tự làm nhé . Nhớ Tk cho mình nha Ok !
a, x * a = aa
x = aa : a
x = 11
b, ab * x = abab
x = abab : ab
x = 101
c, abc * x = abcabc
x = abcabc : abc
x = 1001
d, xx + x + 5 = 125
x*(11 + 1) + 5 = 125 - 5
x*12 = 120
x = 120 : 12
x = 10
e, xxx + xx + x + x = 992
x*(111 + 11 + 1 + 1) = 992
x*124 = 992
x = 992 : 124
x = 8
f, 4725 + xxx + xx + x = 54909
x*(111+11+1) = 54909 - 4725
x*123 = 50184
x = 50184 : 123
x = 408
g, xxx - xx -x - 25 = 4430
x*(111-11-1) = 4430 + 25
x*99 = 4455
x = 4455 : 99
x = 45
h, xxx + xx + x + x + x + 1 = 1001
x*(111 + 11 + 1 + 1 + 1) = 1001 - 1
x* 125 = 1000
x = 1000 : 125
x = 8
Chúc bạn học tốt
a, \(\overline{xx}+x+5=125\)
\(x\times11+x=120\)
\(x\left(1+11\right)=120\)
\(x=120\div12\)
\(x=10\)
Vậy x = 10
\(\overline{xxx}+\overline{xx}+x+x=992\)
\(x\times111+x\times11+x\times2=992\)
\(x\left(111+11+2\right)=992\)
\(x=992\div124\)
\(x=8\)
Vậy x = 8
\(4725+\overline{xxx}+\overline{xx}+x=54909\)
\(x\times111+x\times11+x=50184\)
\(x\left(111+11+1\right)=50184\)
\(x\times123=50184\)
\(x=408\)
Vậy x = 408
b, \(\overline{xxx}-\overline{xx}-x-25=4430\)
\(x\times111-x\times11-x=4455\)
\(x\left(111-11-1\right)=4455\)
\(x=4455\div99\)
\(x=45\)
Vậy x = 45
\(\overline{xxx}+\overline{xx}+x+x+x+1=1001\)
\(x\times111+x\times11+x\times3=1000\)
\(x\left(111+11+3\right)=1000\)
\(x=1000\div125\)
\(x=8\)
Vậy x = 8
\(35655-\overline{xxx}-\overline{xx}-x=5274\)
\(x\times111+x\times11+x=30381\)
\(x\left(111+11+1\right)=30381\)
\(x=30381\div123\)\
\(x=247\)
Vậy \(x=247\)
xx + x + 5 = 25
x * 11 + x * 1 + 5 = 25
x * (11+1) + 5 = 125
x * 12 = 120
x = 120 : 12
x = 10
xxx - xx - x - 25 = 4430
x * 111 -x * 11 - x * 11 - 25 = 4430
x * 99 - 25 = 4430
x * 99 = 4430 + 25
x * 99 = 4455
x = 4455 : 9
x = 45
xxx + xx + x + x = 992
x * 111 + x * 11 + x * 1 + x * 1= 992
x * ( 111 +11 +1+1) = 992
x * 124 = 992
x = 992 : 124
x = 8
mấy con khác cũng tương tự nhé .
đúng thì nhé
Ta có
xx + x + 5 = 25
x * 11 + x * 1 + 5 = 25
x * (11+1) + 5 = 125
x * 12 = 120
x = 120 : 12
x = 10
xxx - xx - x - 25 = 4430
x * 111 -x * 11 - x * 11 - 25 = 4430
x * 99 - 25 = 4430
x * 99 = 4430 + 25
x * 99 = 4455
x = 4455 : 9
x = 45
xxx + xx + x + x = 992
x * 111 + x * 11 + x * 1 + x * 1= 992
x * ( 111 +11 +1+1) = 992
x * 124 = 992
x = 992 : 124
x = 8
\(xxx+xx+x+x=992\)
\(111x+11x+x+x=992\)
\(x\times\left(111+11+1+1\right)=992\)
\(x\times124=992\)
\(x=992\div124\)
\(x=8\)
xxxx-xx-x-25=4430
xxxx-xx-x =4430-25(tim so hang)
Xx111-Xx11-x=4405
Xx(111+11+1)=4405
Xx1099=4405
x =4405:1099(tim thua so)
x =4(dư 9)
xxx+xx+x+x=992
=>(x*100+x*10+x)+(x*10+x)+x+x=992
=>x*100+x*10+x+x*10+x+x+x=992
=>x*(100+10+1+10+1+1+1)=992
=>x*124=992
=>x=992:124
=>x=8
Đề này ko có tào lao đâu nha
xxx + xx + x + x = 992
=>3x+2x+2x=992
=>x*(3+2+2)=992
=>x*7=992
=>x=992/7
\(xxx-xx-x-25=443\)\(0\)
\(xxx-xx-x=4430-\)\(25\)
\(xxx-xx-x=4405\)
\(x=4405:5\)
\(x=881\)
\(Thử\)\(lại\)\(:\)
\(881.881.881\)\(-881.881\)\(-881-25\)
\(=683797841\)\(-776161\)\(-881-25\)
\(=683021680-881\)\(-25\)
