x - 23 = 43
Tính :
45 x 32 + 45 x 23
45 : 32 + 45 : 23
43 x 33 + 43 x 22 + 43
45 x 32 + 45 x 23
= 45 x ( 32 + 23 )
= 45 x 55
= 2475
45 : 32 + 45 : 23
= 1,40625 + 1,9566521739
= 3,362771739
43 x 33 + 43 x 22 + 43
= 43 x ( 33 + 22 + 1 )
= 43 x 56
= 2408
45 x 32 + 45 x 23
= 45 x ( 32 + 23 )
= 45 x 55
= 2475
45 : 32 + 45 : 23
= 1,40625 + 1,9566521739
= 3,362771739
43 x 33 + 43 x 22 + 43
= 43 x ( 33 + 22 + 1 )
= 43 x 56
= 2408
45 x 32 + 45 x 23
= 45 x ( 32 + 23 )
= 45 x 55
= 2475
45 : 32 + 45 : 23
= 1,40625 + 1,9566521739
= 3,362771739
43 x 33 + 43 x 22 + 43
= 43 x ( 33 + 22 + 1 )
= 43
k mk nha mai đổi tk bn tk mk câu này
tim x biet:
23.(43-x)=23
23 . ( 43 - x) = 23
43-x=23:23
43-x=1
x=43-1
x=42
23 . ( 43 - x ) = 23
43 - x = 23 : 23
43 - x = 1
x = 43 -1
x = 42
Vậy x = 42
Học tốt!!!
23.(43-x)=23
(43-x)=23:23
(43-x)=1
x=43-1
x=42
vậy x=42
Cho biểu thức: 234 x 43 + 234 x 57. Cách tính đúng là: *
A. 234 x 43 + 234 x 57 = 234 x 43 + 234 = 10 296
B. 234 x 43 + 234 x 57 = 234 x 43 + 57 = 10 119
C. 234 x 43 + 234 x 57 = 234 x (57 – 43) = 3 276
D. 234 x 43 + 234 x 57 = 234 x (43 + 57) = 23 400
(x-18)-42=(23-43)-(70+x)
Ta có: \(\left(x-18\right)-42=\left(23-43\right)-\left(70+x\right)\)
\(\Leftrightarrow x-18-42=23-43-70-x\)
\(\Leftrightarrow x-60=-90-x\)
\(\Leftrightarrow x+x=-90+60\)
\(\Leftrightarrow2x=-30\)
hay x=-15
Vậy: x=-15
\(\left(x-18\right)-42=\left(23-43\right)-\left(70+x\right)\)
\(\Leftrightarrow x-18-42=-20-70-x\)
\(\Leftrightarrow x-60=-90-x\)
\(\Leftrightarrow x+x=-90+60\)
\(\Leftrightarrow2x=-30\)
\(\Leftrightarrow x=-15\)
Ta có: (x−18)−42=(23−43)−(70+x)(x−18)−42=(23−43)−(70+x)
⇔x−18−42=23−43−70−x⇔x−18−42=23−43−70−x
⇔x−60=−90−x⇔x−60=−90−x
⇔x+x=−90+60⇔x+x=−90+60
⇔2x=−30⇔2x=−30
x=-15
Vậy: x=-15
Tìm x :
a./ x-15=53
b./43-x=23
c./ 23+x=56
a./ x-15=53
x=53+15
x=68
b./43-x=23
x=43-23
x=20
c./ 23+x=56
x=56-23
x=33
a) x - 15 = 53
=> x = 53 + 15
=> x = 68
b) 43 - x = 23
=> x = 43 - 23
=> x = 20
c) 23 + x = 56
=> x = 56 - 23
=> x = 33
x + 23 = 43 x 2
x + 23 = 43 x 2
=> x + 23 = 86
=> x = 86 - 23
=> x = 63
Chúc bn học giỏi!
x + 23 = 43 x 2 \(\Rightarrow\) x + 23 = 86 \(\Rightarrow\) x = 63
vậy x=63
x + 23 = 43
x + 23 = 43
x = 43 - 23
x = 20
tk mình nha bạn
x+24 =43-23
\(x+24=43-23\)
\(x+24=20\)
\(x=20-24\)
\(x=-4\)
x + 24 = 43 - 23
x + 24 = 20
x = 20 - 24
x = -4
x + 24 = 43 - 23
x + 24 = 10
x = 10 - 24
x = - 14
đề bài này hình như sai lớp 4 ko thể có dạng toán âm được
12|x-1|:3=43+23
Ta có: \(12\cdot\left|x-1\right|:3=4^3+2^3\)
\(\Leftrightarrow\dfrac{12\left|x-1\right|}{3}=64+8=72\)
\(\Leftrightarrow4\left|x-1\right|=72\)
\(\Leftrightarrow\left|x-1\right|=18\)
\(\Leftrightarrow\left[{}\begin{matrix}x-1=18\\x-1=-18\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=19\\x=-17\end{matrix}\right.\)
Vậy: \(x\in\left\{19;-17\right\}\)
\(12|x-1|:3=4^3+2^3\)
\(12|x-1|:3=64+8\)
\(12|x-1|:3=72\)
\(12|x-1|=72.3\)
\(12|x-1|=216\)
\(|x-1|=216:12\)
\(|x-1|=18\)
\(\Rightarrow x-1 \in \{18;-18\}\)
\(\Rightarrow x \in \{19;-17\}\)
-Vậy \( x \in \{19;-17\}\)