- ( - x + 13 - 142 ) + 18 = 55
giúp mik vs T-T
-(-x-13-142)+18=55
\(-\left(-x-13-142\right)+18=55\)
\(\Rightarrow x+13+142+18=55\)
\(\Rightarrow x+13+160=55\)
\(\Rightarrow x+173=55\)
\(\Rightarrow x=55-173\)
\(\Rightarrow x=-118\)
Vậy: x = -118
- ( - x + 13 - 142 ) + 18 = 55
\(-\left(-x+13-142\right)+18=55\)
=>\(x-13+142+18=55\)
=>\(x+147=55\)
=>x=55-147=-92
\(-(-x+13-142)+18=55\\\Rightarrow x-13+142=55-18\\\Rightarrow x+129=37\\\Rightarrow x=37-129\\\Rightarrow x=-92\)
-(x+13-142)+18=55. Tìm x
Ta có : - ( x + 13 - 142 ) + 18 = 55
<=> - ( x + 13 - 142 ) = 55 - 18
<=> - ( x + 13 - 142 )= 27 ( Vô lí vì -( x +13 - 142 ) là 1 số nguyên âm còn 27 là số nguyên dương mà - ( x +13 - 142 ) = 27 )
Do đó x không tồn tại
Vậy không tồn tại x thỏa mãn
hok tốt
# owe
-(x+13-142)+18=55
=>- x-13+142+18=55
-x-13+142 = 55-18
- x-13+142 = 37
- x-13 = 37-142
- x-13 = -105
-x = -105+13
- x = -92
x =92
Vậy x = 92
(Nếu bạn nào muốn tham gia team mik kb nha)
\(-\left(x+13-142\right)+18=55\)
\(\Rightarrow-\left(x+13-142\right)=55-18=37\Leftrightarrow x+13-142=-37\)
\(\Rightarrow x+13=\left(-37\right)+142=105\Rightarrow x=105-13=92\)
Vậy \(x=92\)
Bài 1. Tìm số nguyên x , biết: a) 12+(4−x)=−5
b) −(−x+13−142)+18=55
\(\text{ a) 12+(4−x)=−5}\\ 4-x=-5-12\\ 4-x=-17\\ x=4-\left(-17\right)\\ x=21\)
\(\text{b) −(−x+13−142)+18=55}\\ x-13+142+18=55\\ x-173=55\\ x=55+173=228\)
Tìm x :
- ( - x + 13 - 142 ) + 18 = 55
Ai nhanh mk tick
- ( -x + 13 - 142 ) + 18 = 55
x - 13 + 142 + 18 = 55
x + 147 = 55
x = 55 - 147
x = -92
-(-x+13-142)=55-18
-(-x+13-142)=37
x-13+142 =37
x+13 =37-142
x+13 =-105
x =-105-13
x =-118
Vậy x=-118
- ( - x + 13 - 142 ) + 18 = 55
- x + 13 - 142 = 55 - 18
- x + 13 - 142 = 37
- x + 13 = 37 + 142
- x + 13 = 179
- x = 179 - 13
- x = 166
Hk tốt,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
k nhé
tìm số nguyên x, biết
a,-(-x + 13 - 142 ) + 18 = 55
b, 25 - 3.(6 - x ) = 22
c, [( 2x - 11) : 3 + 1].5 = 20
d,3( x + 5 ) - x - 11 = 24
-( -x + 13 - 142 ) + 18 = 55
-( -x - 129) + 18 = 55
x + 129 + 18 = 55
x + 147 = 55
x = 55 - 147
x = -92
b, 25 - 3.(6 -x ) = 22
3(6-x) = 25 - 22
3(6-x) = 3
6 - x = 1
x =5
c, [ ( 2x - 11 ) :3 +1] .5 = 20
( 2x - 11) : 3 + 1 = 20 : 5
(2x - 11) : 3 + 1 = 4
( 2x - 11) : 3 = 4 - 1
(2x - 11 ) : 3 = 3
2x - 11 = 3 x 3
2x - 11 = 9
2x = 9 + 11
2x = 20
x = 10
d, 3(x+5) - x - 11 = 24
3(x+5) - x = 24 +11
3x + 15 - x = 35
2x = 35 - 15
2x = 20
x = 10
Bài 1: Tìm x nguyên, biết:
a) x + 5 = 20 - (12 -7)
b)15 - (3+ 2x) = 22
c) -11 - (19 - x) = 50
d)159 - (25 - x) = 43
e) (79 - x) - 43 = - (17 - 52)
f) (7 + x) - (21 - 13) = 32
g) - x + 20 = (-15) + 8 + 13
h) - (-x + 13 -142) + 18 = 55
Xin cảm ơn!
a) \(x+5=20-\left(12-7\right)\)
\(\Rightarrow x+5=20-5\)
\(\Rightarrow x+5=15\)
\(\Rightarrow x=15-5\)
\(\Rightarrow x=10\)
b) \(15-\left(3+2x\right)=2^2\)
\(\Rightarrow3+2x=15-4\)
\(\Rightarrow3+2x=11\)
\(\Rightarrow2x=11-3\)
\(\Rightarrow2x=8\)
\(\Rightarrow x=\dfrac{8}{2}\)
\(\Rightarrow x=4\)
c) \(-11-\left(19-x\right)=50\)
\(\Rightarrow19-x=-11-50\)
\(\Rightarrow19-x=-61\)
\(\Rightarrow x=61+19\)
\(\Rightarrow x=80\)
d) \(159-\left(25-x\right)=43\)
\(\Rightarrow25-x=159-43\)
\(\Rightarrow25-x=116\)
\(\Rightarrow x=25-116\)
\(\Rightarrow x=-91\)
e) \(\left(79-x\right)-43=-\left(17-52\right)\)
\(\Rightarrow\left(79-x\right)-43=52-17\)
\(\Rightarrow79-x-43=35\)
\(\Rightarrow36-x=35\)
\(\Rightarrow x=1\)
f) \(\left(7+x\right)-\left(21-13\right)=32\)
\(\Rightarrow7+x-8=32\)
\(\Rightarrow x-1=32\)
\(\Rightarrow x=32+1\)
\(\Rightarrow x=33\)
g) \(-x+20=-15+8+13\)
\(\Rightarrow-x+20=6\)
\(\Rightarrow x=20-6\)
\(\Rightarrow x=14\)
h) \(-\left(-x+13-142\right)+18=55\)
\(\Rightarrow x-13+142+18=55\)
\(\Rightarrow x+147=55\)
\(\Rightarrow x=55-147\)
\(\Rightarrow x=-92\)
13 giờ 27 phút + 5 giờ 55 phút 14 ngày 15 giờ- 3 ngày 20 giờ 12 ngày 7 giờ x 7 22 giờ 16 phút : 4 Giải giúp mik vs ạ,mik cảm ơn
13-18-(-42)-15 Giúp mik vs
\(13-18-\left(-42\right)-15\\ =13-18+42-15\\ =22\)