Tìm x:
131 . x - 941 =16
12 ( x - 1 ) : 3 = 103
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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
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
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\(\Rightarrow131.x-941=1024\)
\(\Rightarrow131x=1965\)
\(\Rightarrow x=15\)
131.x-941=1024
131.x=1024+941
131.x=1965
x=1965:131
x=15
vậy x=15
\(a)88-3(7+x)=64\) \(c)[(x+32)-17]\div2=42\)
\(\Rightarrow3(7+x)=88-64\) \(\Rightarrow(x+32)-17=42.2\)\(\Rightarrow x+32-17=84\)
\(\Rightarrow3(7+x)=24\) \(\Rightarrow x=84+17-32\)
\(\Rightarrow7+x=24\div3\) \(\Rightarrow x=69\)
\(\Rightarrow7+x=8\)
\(\Rightarrow x=8-7\)
\(\Rightarrow x=1\)
\(b)131.x-941=2^7.2^3\) \(d)[(x^2+54)-32]\div2=61\)
\(\Rightarrow131.x-941=2^{10}\) \(\Rightarrow(x^2+54)-32=61.2\)
\(\Rightarrow131.x=1024+941\) \(\Rightarrow x+54-32=122\)
\(\Rightarrow131.x=1965\) \(\Rightarrow x=122+32-54\)
\(\Rightarrow x=1965\div131\) \(\Rightarrow x=100\)
\(\Rightarrow x=15\)
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
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) 1 ≤ x ≤ 6 ⇒ x ∈ - 3 ; - 2 ; - 1 ; 0 ; 1
b) - 7 ≤ x ≤ - 3 ⇒ x ∈ - 3 ; - 2 ; - 1 ; 0 ; 1
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) x = 957/131
b) x = 107/4
học tốt