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Bài làm:
a) x + 27 = 45
x = 45 - 27
x = 18
Vậy x = 18
b) x - 27 = 45
x = 45 + 27
x = 72
Vậy x = 72
c) 45 - x = 27
x = 45 - 27
x = 18
Vậy x = 18
d) 25 + x = 18 + 52
25 + x = 70
x = 70 - 25
x = 45
Vậy x = 45
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
32+x=45
x=45-32
x=13
45-x=23
x=45-23
x=22
66-x+3=41
66-x+3=41-3
66-x =38
x =66-38
x =28
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x + 45 = 98 - 45
x + 45 = 53
x = 53 - 45
x = 8
tick mình nha
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 45 = 54
x = 54 - 45
x = 9
x - 45 = 54
x = 54 + 45
x = 99
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325.45+162,5.34+325.45
=325.45+325.17+325.45
=325.(45+45+17)
=325.107
=34775
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a) x = 25 ;26
b) x = 0;1;2;3;4;...........;28;2930
c) x= 82; 83;84;85;86;87;88;89;90;91;92;93
d) x = 92
x = 25 ; 26
x = 0 ; 1 ; 2 ; ... ; 30
x = 82 ; ... ; 92
x = 92
![](https://rs.olm.vn/images/avt/0.png?1311)
x + x + x + x + 45 = 127 - 58
x . 4 + 45 = 69
x.4 = 69 - 45 = 24
x = 24 : 4
x = 6
10245 x 45 = 461 025
10245 x 45
= 461 025