Tìm x:
131 . x - 941 =16
12 ( x - 1 ) : 3 = 103
Tìm số tự nhiên x, biết:
a) (x- 29) - 11 = 0;
b) 231 + (312 - x) = 531
c) (4 . x + 5) : 3 - 121 : 11 = 4
d) 131. x - 941 = 27 . 23
a) x = 40.
b) x = 12.
c) x = 10.
d) x = 15.
Tìm x
a)131.x-941=32
b)88-(7+x).3=64
c)51+(26-3x):5=55
a)131.x-941=32
131x=32+941=973
x=973:131
=973/131
b.88-(7+x).3=64
(7+x).3=88-64=24
7+x=24:3=8
x=8-7
x=1
c)51+(26-3x):5=55
(26-3x):5=55-51=4
26-3x=4.5=20
2x=26-20=6
x=6:3=2
a) 131 . x - 941 = 32
131 . x = 32 + 941
131 . x = 973
x = 973 : 131
x = 973/131
a) 131 . x - 941 = 32
131 . x = 32 + 941
131 . x = 973
x = 973 : 131
x = 973/131
131 nhân x - 941 = 2 mũ 7 nhân 2 mũ 3
vì 2^7x2^3=1024
xuy ra 1024-941:131
vậy x=15
\(131\cdot x-941=2^7\cdot2^3\)
131 . x - 941 = 27 . 23
131 . x - 941 = 27+3
131 . x - 941 = 210
131 . x - 941 = 1024
131 . x = 1024 + 941
131 . x = 1965
x = 1965 : 131
x = 15
Vậy x = 15
nhéthien binh cong chua
k mình nhé bạn mình trả lời đầu tiên !
\(\Rightarrow131.x-941=1024\)
\(\Rightarrow131x=1965\)
\(\Rightarrow x=15\)
131 . x - 941 = 2^7 . 2^3
131 . x - 941 = 2^10
131 . x - 941 = 1024
131 . x = 1024 + 941
131 . x = 1965
x = 1965 : 131
x = 15
131.x-941=1024
131.x-941=1024
131.x=1024+941
131.x=1965
x=1965:131
x=15
vậy x=15
\(131x-941=1024\Leftrightarrow131x=1965\Leftrightarrow x=15\)
131.x-941=1024
131.x=1024+941
131.x=1965
x=1965:131
x=15
Đây là kết quả đúng
1) Tìm x:
a) 88 - 3 ( 7 + x ) = 64 b) 131 . x - 941 = 27. 23
c) [ ( x + 32 ) - 17 ] : 2 = 42 d) [ ( x2 + 54 ) - 32 ] : 2 = 61
\(a)88-3(7+x)=64\) \(c)[(x+32)-17]\div2=42\)
\(\Rightarrow3(7+x)=88-64\) \(\Rightarrow(x+32)-17=42.2\)\(\Rightarrow x+32-17=84\)
\(\Rightarrow3(7+x)=24\) \(\Rightarrow x=84+17-32\)
\(\Rightarrow7+x=24\div3\) \(\Rightarrow x=69\)
\(\Rightarrow7+x=8\)
\(\Rightarrow x=8-7\)
\(\Rightarrow x=1\)
\(b)131.x-941=2^7.2^3\) \(d)[(x^2+54)-32]\div2=61\)
\(\Rightarrow131.x-941=2^{10}\) \(\Rightarrow(x^2+54)-32=61.2\)
\(\Rightarrow131.x=1024+941\) \(\Rightarrow x+54-32=122\)
\(\Rightarrow131.x=1965\) \(\Rightarrow x=122+32-54\)
\(\Rightarrow x=1965\div131\) \(\Rightarrow x=100\)
\(\Rightarrow x=15\)
A) 88-3(7+x)=64
3(7+x)=88-64
3(7+x)=24
7+x=24:3
7+x=8
X=8-7
X=1
[(x+32)-17]:2=42
(X+32)-17=42*2
(X+32)-17=84
X+32=84+17
X+32=101
X =101-32
X=69
tìm số tự nhiên x, biết:
a) (x-29)-11=0 b) 231+(321-x)=531
c) (4.x+5):3-121:11=4 d) 131.x-941=27.23
giải nhanh hộ mình nhé
a) (x - 29) - 11 = 0
x - 29 = 0 + 11
x - 29 = 11
x = 29 + 11
x = 40
b) 231 + (321 - x) = 531
231 + 321 - x = 531
552 - x = 531
x = 552 - 531
x = 21
a) (x - 29) - 11 = 0
(x - 29) = 0 + 11
x - 29 = 11
x = 11 + 29
x = 40
b) 231 + (321 - x) = 531
(321 - x) = 531 - 231
321 - x = 300
x = 321 - 300
x = 21
c) (4 . x + 5) : 3 - 121 : 11 = 4
(4 . x + 5) : 3 - 11 = 4
(4 . x + 5) : 3 = 4 + 11
(4 . x + 5) : 3 = 15
(4 . x + 5) = 15 . 3
(4 . x + 5) = 45
4 . x + 5 = 45
4 . x = 45 - 5
4 . x = 40
x = 40 : 4
x = 10
d) 131 . x - 941 = 27 x 23
131 . x - 941 = 621
131 . x = 621 + 941
131 . x = 1562
x = 1562 : 131
x = 11.9236641221
Học tốt!!!
a) (x-29)-11=0
<=> x-29=0+11
<=>x-29=11
<=> x=11+29
<=>x=40
Vậy x=40
b) 231+(321-x)=531
<=> 321-x=531-231
<=> 321-x=300
<=> x =321-300
<=> x=21
Vậy x=21
c) (4.x+5):3-121:11=4
<=>(4.x+5):3-11=4
<=>(4.x+5):3 =4+11
<=>(4.x+5):3 =15
<=> 4.x+5 =15.3
<=> 4.x+5=45
<=> 4.x =45-5
<=> 4.x=40
<=> x=40:4
<=>x=10
Vậy....
d) 131.x-941=27.23
<=> 131.x-941=621
<=> 131.x =621+941
<=> 131.x= 1562
<=> x =1562:131
<=> x=\(\frac{1562}{131}\)
Vậy...
Tìm x thuộc Z, biết:
a) 1 2 + 1 3 + 1 6 ≤ x ≤ 15 4 + 18 8
b) 11 3 + − 19 6 + − 15 2 ≤ x ≤ 19 12 + − 5 4 + − 10 3
a) 1 ≤ x ≤ 6 ⇒ x ∈ - 3 ; - 2 ; - 1 ; 0 ; 1
b) - 7 ≤ x ≤ - 3 ⇒ x ∈ - 3 ; - 2 ; - 1 ; 0 ; 1
Bài 1: Tính hợp lí
a, -1982 - { 31 - [ 1982 - ( 28-31) ] }
b, -19 . ( 71 -131 ) - 131 . ( 71-19)
c, 54 . ( 186 -12 ) - 186. ( 54+12)
Bài 2: Tìm x, biết
a, -3x -1=8
b, -4.( x-1) -1 = 13-3 ( x+2)
c, ( x-2) -13 = 16+ ( 2x+1)
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