
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.


1)
-131-74+(-45)-(131)
=-131 - 74 - 45 - 131
=-381
2)
x-(-14)= -54
x + 14 = -54
x = -54 - 14
x =-68
135-(x-47)=23
x - 47 = 135 - 23
x - 47= 112
x= 112 + 47
x=159

Bài 1:
-131-74+(-45)-131
=-131-74-45-131
=-381.
Bài 2:
135-(x-47)=23
<=>x-47=135-23
<=>x-47=112
<=>x=112+47
<=>x=159
Vậy x=159
Chúc bạn học tốt nha!!!

(320 + x) : x + 120 = 131
(320 + x) : x = 131 - 120
(320 + x) : x = 11
320 : x + x : x = 11
320 : x + 1 = 11
320 : x = 11-1
320 : x = 10
x = 320 : 10
x = 32
( 320 + x ) : x + 120 = 131
( 320 + x ) : x = 131 - 120
( 320 + x ) : x = 11
320 : x + x : x = 11
320 : x + 1 = 11
320 : x = 11 - 1
320 : x = 10
x = 320 : 10
x = 32

Ta có \(131x-941=16\)
\(\Rightarrow131x=957\)
\(\Rightarrow x=\frac{957}{131}\)
b.\(12.\left(x-1\right):3=103\)
\(\Rightarrow12.\left(x-1\right)=309\)
\(\Rightarrow x-1=\frac{103}{4}\)
\(\Rightarrow x=\frac{107}{4}\)

a)491 - ( x + 83) = 336
(x+83)=491-336
(x+83)=155
x=155-83
x=72
b)( 517 - x ) + 131 = 631
( 517 - x ) =631-131
( 517 - x ) =500
x=517-500
x=17


(1 - x)3 + 158 = 131
=> (1 - x)3 = 131 - 158
=> (1 - x)3 = -27
=> (1 - x)3 = (-3)3
=> 1 - x = -3
=> x = 1 + 3
=> x = 4
Vậy ...
(1 - x)3 + 158 = 131
(1 - x)3 = 131 - 158
(1 - x)3 = -27
(1 - x)3 = -33
1 - x = -3
- x = -3 - 1
- x = -4
=> x = 4

x+30%x=-131
x.(1+30%)=-131
x.13/10=-131
x=-131:13/10
x=-1310/13
x + 30% = -131
x + 3/10x = -131
x . ( 1 + 3/10 ) = -131
x . 13/10 = -131
x = -131 : 13/10
x = -131 . 10/13
x = -1310/13
Vậy x = -1310/13