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\(a,2-x=17-\left(-5\right)\)
\(\Rightarrow2-x=17+5\)
\(\Rightarrow2-x=22\)
\(\Rightarrow x=2-22\)
\(\Rightarrow x=-20\)
Vay...
\(b,11-\left(15+11\right)=x-\left(25-9\right)\)
\(\Rightarrow11-26=x-16\)
\(\Rightarrow-15=x-16\)
\(\Rightarrow-15+16=x\)
\(\Rightarrow x=1\)
a) x - (17 - 8) = 5 + (10 - 3x)
x - 17 + 8 = 5 + 10 - 3x
x + 3x = 5 + 10 + 17 - 8
4x = 24
x = 24 : 4
x = 6
b) 25 - (30 + x) = x - (27 - 8)
25 - 30 - x = x - 27 + 8
-x - x = -27 + 8 - 25 + 30
-2x = -14
x = (-14) : (-2)
x = 7
c) (x - 12) - 15 = (20 - 7) - (18 + x)
x - 12 - 15 = 20 - 7 -18 - x
x + x = 20 - 7 - 18 + 12 + 15
2x = 22
x = 22 : 2
x = 11
d) 9 - 25 = (7 - x) - (25 + 7)
9 - 25 = 7 - x - 25 - 7
x = 7 - 25 - 7 - 9 +25
x = -9
a, 11 - ( 15 + 11 ) = x - ( 25 - 9 )
11-15-11=x-25+9
-15=x-16
x=1
b, 2 - x = 17 - ( - 5 )
2-x=22
x=-20
c, x - 12 = ( - 9 ) - 15
x-12=-24
x=-12
d, 9 - 25 = ( 7 - x ) - ( 25 + 7 )
(7-x)-32=-16
7-x=16
x=-9
#H
\(A)9-25=\left(7-x\right)-\left(25+7\right)\)
\(\Rightarrow9-25=7-x-25-7\)
\(\Rightarrow x=7-25-7-9+25\)
\(\Rightarrow x=\left(7-7\right)+\left(25-25\right)-9\)
\(\Rightarrow x=0+0-9\)
\(x=-9\)
\(B)x-\left(17-x\right)=x-7\)
\(\Rightarrow x-17+x=x-7\)
\(\Rightarrow2x-17=x-7\)
\(\Rightarrow x=-7+17\)
\(x=10\)
a) Ta có: \(x-12=\left(-9\right)-15\)
\(\Rightarrow x-12=-24\)
\(\Rightarrow x=-12\)
b) \(2-x=17-\left(-5\right)\)
\(\Rightarrow2-x=22\)
\(\Rightarrow x=2-22\)
\(\Rightarrow x=-20\)
c) \(11-\left(15+11\right)=x-\left(25-9\right)\)
\(\Rightarrow-15=x-16\)
\(\Rightarrow x=1\)
d) \(x-\left(17-x\right)=x-7\)
\(\Rightarrow x-17+x=x-7\)
\(\Rightarrow x+x-x=-7+17\)
\(\Rightarrow x=10\)
e) \(9-25=\left(7-x\right)-\left(25+7\right)\)
\(\Rightarrow9-25=7-x-25-7\)
\(\Rightarrow-16=-25-x\)
\(\Rightarrow x=-9\)
g) \(x-13=21-x\)
\(\Rightarrow x+x=21+13\)
\(\Rightarrow2x=34\)
\(\Rightarrow x=17\)
a, x - 12 = ( -9 ) - 15
x - 12 = -24
x = -24 + 12
x = -12
b, 2 - x = 17 - ( -5 )
2 - x = 22
x = 2 - 22
x = -20
c, 11 - ( 15 + 11 ) = x - ( 25 - 9 )
11 - 26 = x - 16
-15 = x - 16
x = -15 + 16
x = 1
d, x - ( 17 - x ) = x - 7
x - 17 + x = x - 7
x + x - 17 = x - 7
x + x - x = -7 + 17
x = 10
e.9 - 25 = ( 7- x ) - ( 25 + 7 )
-16 = ( 7 - x ) -32
7 - x = -32 + 16
7 - x = 16
x = 7 - 16
x= -9
g, x - 13 = 21 - x
x + x = 21 + 13
2x = 44
x = 44 : 2
x=22
Trả lời:
\(a,\)\(-9-25=\left(7-x\right)-\left(-25+7\right)\)
\(\Leftrightarrow-34=7-x-\left(-18\right)\)
\(\Leftrightarrow-34=7-x+18\)
\(\Leftrightarrow-34=25-x\)
\(\Leftrightarrow x=59\)(Thỏa mãn \(x\inℤ\))
Vậy x = 59
\(b,\)\(x-\left(17-x\right)=x-7\)
\(\Leftrightarrow x-17+x=x-7\)
\(\Leftrightarrow2x-17=x-7\)
\(\Leftrightarrow x=10\)(Thỏa mãn\(x\inℤ\))
Vậy x = 10
Banh Bao Tong
a)2-x=17-(-5)
2-x=17+5
2-x=22
x=2-20
x=-20
b)x-12=-9-15
x-12=-24
x=(-24)+12
x=-12
c)11-(15+11)=x-(25-9)
11-26=x-16
-15=x-16
x=-15+16
x=1
d)x-25=(7-x)-(25+7)
x-25=(7-x)-32
2x-25=7-32
2x-25=-25
2x=(-25)+25
2x=0
x=0:2
x=0
tick cho mk nha bạn
a)2-x=17-(-5)
2-x=17+5
2-x=22
x=2-20
x=-20
b)x-12=-9-15
x-12=-24
x=(-24)+12
x=-12
c)11-(15+11)=x-(25-9)
11-26=x-16
-15=x-16
x=-15+16
x=1
d)x-25=(7-x)-(25+7)
x-25=(7-x)-32
2x-25=7-32
2x-25=-25
2x=(-25)+25
2x=0
x=0:2
x=0
tìm sood nguyên x biết
5 - x = 17 - (-5)
9-25 = (-7 - x ) - ( 25 - 7)
17 - { -x - [-x - (-x) ] } = -16
a/ 5 - x = 17 - (-5)
5-x = 22
x= -17
a. x- (17 - x) = x-7
x-17+x = x+7
2x-17=x+7
2x-x= 7+17
x= 24
b. 9-25=(7-x)-(25+7)
-16=7-x-25-7
-16=-x-25
x= -25 + 16
x = -9
c. (-12)^2 .x = 56 + 10.13.x
144x = 56 + 130x
144x - 130x = 56
14x=56
x= 56 : 14
x= 4
d. 4/24 : (3x-2) = -3
4/24 = -3.(3x-2)
4/24 = -9x + 6
9x = 6 - 4/24
9x = 35/6
x= 35/6 :9
x= 35/54
e. 5/-45 chia hay nhân với (-3-2x) nhỉ
a, x-(17-x)=x-7
x-17+x = x-7
(x+x) - 17 = x - 7
2x - 17 = x - 7
2x - x = -7 + 17
1x = 10
x = 10
vậy_____
b, 9-25 = (7-x)-25+7
-16 = 7-x - 25 + 7
-16 = 7-x - (25-7)
-16 = 7-x - 18
-16 + 18 = 7 - x
2 = 7- x
2 - 7 = x
-5 = x
vậy____
x - ( 17 - x ) = x - 7
x - 17 + x = x - 7
x + x - x = 17 - 7
x = 10
9 - 25 = ( 7 - x ) - 25 +7
-16 = 7 - x - 25 + 7
- 16 = 7 - 32 - x
- 16 = -25 - x
x = - 25 - ( - 16 )
x = -9