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a,x-77-(-73)=34
x-77 =34+(-73)
x-77 =-39
x =(-39)+77
x =38
b,25-(x+8)-25=46
25-(X+8) =46-25
25-(x+8) =21
x+8 =25-21
x+8 =4
x =4-8
x =-4
a) 27 - ( x + 27 ) - 50 = 25
27 - ( x + 27 ) = 25 + 50
27 - ( x + 27 ) = 75
x + 27 = 27 - 75
x + 27 = - 48
x = ( - 48 ) - 27
x = - 75
Vậy x = - 75
1a) 25 .8 - 12.5 + 272 :17 - 8
= 200 - 60 + 16 - 8
= 140+16-8
= 156 - 8
= 148
b) 125: 25 +14 - 142 : 71
= 5 + 14 - 2
= 19 - 2 = 17
c) 13. 17 - 256: 16 + 14 : 7 - 1
= 221 - 16 + 2 - 1
= 205 + 2 - 1
= 207 - 1 = 206
d) 15 . 24 - 14 . 5 (145 : 5 - 27)
= 360 - 70 (29- 27)
= 360 - 70 . 2
= 360 - 140
= 220
2a) 37 + x = 55
x= 55 - 37
x = 18
b) x- 31 = 24
x = 24 + 31
x = 55
c) 21 (x-11) = 21
x - 11 = 21 : 21
x = 1 +11
x = 12
d ) 9. (x - 29)= 0
x - 29 = 0 :9
x = 29
e) (x - 1954) . 5 = 50
x - 1954 = 50 : 5
x = 1964
f ) 30 . 60 - x = 30
1800 - x = 30
x = 1800 - 30
x = 1770
Viết mỏi tay quá huhuh
a/ ( 35-x)-25=40-(15-18)
(35-x)-25=40-(-3)
(35-x)-25=43
35-x=43+25
35-x=68
x=35-68
x= -33
b/ x+42=-15+27: 3^2
x+42=-15+27 : 9
x+42=-15+3
x+42=-12
x=-12 -42
x= -54
a) 2 . ( x - 5 ) - 17 = 25
=> 2(x - 5) = 25 + 17
=> 2(x - 5) = 42
=> x - 5 = 42 / 2
=> x - 5 = 21
=> x = 21 + 5 = 26
b) 3 . ( x + 7 ) - 15 = 27
=> 3(x + 7) = 27 + 15
=> 3(x + 7) = 42
=> x + 7 = 42 / 3
=> x + 7 = 14
=> x = 14 - 7 = 7
a) \(\text{2 . ( x - 5 ) - 17 = 25}\)
\(\text{=> 2 . ( x - 5 ) = 25 + 17}\)
\(\text{=> 2 . ( x - 5 ) = 42}\)
\(\text{=> x - 5 = 42 : 2}\)
\(\text{=> x - 5 = 21}\)
\(\text{=> x = 21 + 5}\)
\(\text{=> x = 26}\)
Vậy x = 26.
b) \(\text{3 . ( x + 7 ) - 15 = 27}\)
\(\text{=> 3 . ( x + 7 ) = 27 + 15}\)
\(\text{=> 3 . ( x + 7 ) = 42}\)
\(\text{=> x + 7 = 42 : 3}\)
\(\text{=> x + 7 = 14}\)
\(\text{=> x = 7}\)
Vậy x = 7.
a) x=50-37
x= 13
b) 2.x=11+3
2.x=14
x=14:2=7
c) 2+x=6.5
2.x=30
x=30:2=15
e) \(^{^{^{ }}x^9}\)=25
\(\Rightarrow\)x=5
a)50 : (x – 27 ) = 25
x – 27 = 50 : 25
x – 27 = 2
x = 29