x + 12 = 26
Tính bằng cách thuận tiện nhất
12 x 155 - 12 x 54 - 12
26 x 101 - 26
12 x 155 - 12 x 54 - 12
=12 x 155 - 12 x 54 - 12x1
=12x(155-54-1)
=12x100
=1200
26 x 101 - 26
=26 x 101 -26 x 1
=26 x (101-1)
=26 x 100
=2600
12/15 x 26/11 - 12/15 x 9/11 - 12/15 x 6/11 tính nhanh mình tick
\(=\dfrac{12}{15}\times\left(\dfrac{26}{11}-\dfrac{9}{11}-\dfrac{6}{11}\right)=\dfrac{12}{15}\times\dfrac{11}{11}=\dfrac{12}{15}=\dfrac{4}{5}\)
= 12/15 x (26/11 - 9/11 - 6/11)
= 12/15 x 11/11
= 12/15
1,
A, 2017-|-26|×|-2³|+12
b M=26+|-x| .y -18 với x=12,y=6
2,tìm x
a x=|-32|
b 26-3 |x|=8
c |x-1|=6-|-6|
Giúp mk vs mk đag cần gấp.
| x + 4 | + 12 = 26 ( tìm x )
=> \(|x+4|\) = 14
=> \(\left[{}\begin{matrix}x=10\\x=-18\end{matrix}\right.\)
Vậy \(\left[{}\begin{matrix}x=10\\x=-18\end{matrix}\right.\)
TH1: Nếu x+4\(\ge0\) thì ta được:
\(\left|x+4\right|+12=26\) \(\Leftrightarrow x+4+12=26\Leftrightarrow x+16=26\Leftrightarrow x=26-16=10\)
TH2: Nếu x+4\(< 0\) thì ta được:
\(\left|x+4\right|+12=26\) \(\Leftrightarrow x-4+12=26\Leftrightarrow x+8=26\Leftrightarrow x=26-8=18\)
Vậy ....
\(\left|x+4\right|=26-12\)
\(\left|x+4\right|=14\)
\(->x+4=14\) \(hay\) \(x+4=-14\)
\(->x=14-4\) \(x=\left(-14\right)-x\)
\(->x=10\) \(x=-18\)
\(vậy\) \(x\) \(\text{∈}\) \(\left\{-18;10\right\}\)
X-26=38+12
x - 26 = 38 + 12
x - 26 = 50
x = 50 + 26
x = 76
\(\dfrac{39}{x+2}=\dfrac{26}{12}\)
x = ?
\(\dfrac{39}{x+2}=\dfrac{26}{12}\\ \Rightarrow26\times\left(x+2\right)=39\times12\\ \Rightarrow26\times\left(x+2\right)=468\\ \Rightarrow x+2=468:26\\ \Rightarrow x+2=18\\ \Rightarrow x=18-2\\ \Rightarrow x=16\)
Khong tinh ket qua cua tung bieu thuc hay dien dau ( > , < , = ) vao cho cham
a) 12 x ( 367 + 82 ) . . . 82 x 12 + 12 x 367
b) ( 175 - 26 ) x 17 . . . 17 x 177 - 17 x 26
Nho giai thich nhe !
Ai nhznh mk tk !
a)12 x ( 367 + 82 ) = 82 x 12 + 12 x 367
b) ( 175 - 26 ) x 17 < 17 x 177 - 17 x 26
a)Vì 12 x ( 367 + 82 ) = 5 388;82 x 12 + 12 x 367 = 5 388
b)Vì ( 175 - 26 ) x 17 = 2 533;17 x 177 - 17 x 26 =2 567
Tìm x:
a. x x 26 = 2730
b. 3708 : x = 12
Hướng dẫn giải:
a.
x x 26 = 2730
x = 2730 : 26
x = 105
b.
3708 : x = 12
x = 3708 : 12
x = 309
2x=26+x-12