123 + 12 x 123 + 48 = ?
a.X-12=15
b.123-5(x+4)=48
https://hoc24.vn/cau-hoi/tim-x-bieta-x-12-15-b-123-5x438.3496371618478
tính nhanh:
a,31.(-18)+31.(-81)-31
b,13.(23+22)-3.(17+28)
c,(-12).47+(-12).52+(-12)
d,-48+48.(-78)+48.(-21)
e,135.(171-123)-171.(135-123)
g,-(-2009+97)-74.(-18)+74.(-118)-2009-3
\(a,31.\left(-18\right)+31.\left(-81\right)-31\)
\(=31\left(-18-81-1\right)\)
\(=31\left(-100\right)\)
\(=-3100\)
\(b,13\left(23+22\right)-3\left(17+28\right)\)
\(=299+286-51-84\)
\(=450\)
12 x X = 123 x 123 + 409
12 x X = 123 x 123 + 409
12 x X = 15129 + 409
12 x X = 15538
X = 15538 : 12
X = \(\dfrac{7769}{6}\)
\(12.X=123.123+409\)
\(12.X=15129+409\)
\(12.X=15538\)
\(X=15538:12\)
\(X=\dfrac{7769}{6}\)
Vậy \(X=\dfrac{7769}{6}\)
Ghi chú 12 . X = 12 x X
Tính : a, 5 / 8 x 0 b, 8 / 21 x 1 c, 9 x 7 x 3 x 8 x 5 / 7x 8 x 5 x 9 x 4 d, 9 / 8 x 8 / 2 e, 5 / 9 x 3 / 8 So sánh : 9 / 12 x 4 ............. 12 / 1 x 2 14 / 2 x 48 / 123 .......... 48 /14 + 45 / 12 x 123 / 12
a,\(\frac{5}{8}\times0=0\)
b.\(\frac{8}{21\times1}\)=\(\frac{8}{21}\)
x+10=-14
x-7=-5
|x|+5=8
5x-12=48
82+{200-x}=123
123 + 123 + 23 + 12 =?
12 x 4 =?
123 + 123 + 23 +12 = 281
12 x 4 =48
ai qua nhớ cho mk nha ^_-,cảm ơn cac bn nhìu
123+123+23+12=281
12x4=48 nha
o0o Phương Uyên o0o- ( x + 48) + 123 + - 16
-48 x 76 + 48 x (-123)
mn ơi làm cho mik bài này với ạ
$-48\times76+48\times(-123)$
$=-48\times76+(-48)\times123$
$=-48\times(76+123)$
$=-48\times199$
$=-9552$
−48.76+48.(−123)
=−48.76+(−48).123
=−48.(76+123)
=−48.199
=−9552
-48 . 76 + 48 . (-123)
= 48 . (-76) + 48 . (-123)
= 48 . [(-76) + (-123)]
= 48 . (-199)
= -9552