18 x 9 + 18 x 2 - 18 x 3 + 18 x 2
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.


a) 32 : 4 : 2 = 8 : 2 = 4
32 : 4 : 2 = 32 : 2 = 16
b) 18 : 2 x 3 = 18 : 6 = 3
18 : 2 x 3 = 9 x 3 = 18


\(\frac{1.5.18+2.10.36+3.15.54}{1.3.9+2.6.18+3.9.27}=\frac{1.5.18.\left(1+2.2.2+3.3.3\right)}{1.3.9.\left(1+2.2.2+3.3.3\right)}\)
\(=\frac{1.5.18}{1.3.9}=\frac{10}{3}\)



a, (x-3)2 - 18 = -9
(x-3)2 = 18 - 9
(x-3)2 = 9
(x-3)2 = 32
x-3 = 3
x = 3+3
x = 6
b, (x-7)2 + (-18) = |-31|
(x-7)2 - 18 = 31
(x-7)2 = 31+18
(x-7)2 = 49
(x-7)2 = 72
x - 7 = 7
x = 7+7
x = 14
( x - 3 )2 - 18 = -9
( x - 3 )2 = -9 + 18
( x - 3 )2 = 9
=> ( x - 3 )2 = 32
=> x - 3 = 3
=> x = 3 + 3 = 6
( x - 7 )2 + ( - 18 ) = | -31 |
=> ( x - 7 )2 + ( -18 ) = 31
( x - 7 )2 = 31 - ( -18 )
( x - 7 )2 = 49
=> ( x - 7 )2 = 72
=> x - 7 = 7
=> x = 7 + 7 = 14

a, \(\dfrac{7}{18}x-\dfrac{2}{3}=\dfrac{5}{18}\)
\(\dfrac{7}{18}x=\dfrac{5}{18}+\dfrac{2}{3}\)
\(\dfrac{7}{18}x=\dfrac{17}{18}\)
\(x=\dfrac{17}{18}\div\dfrac{7}{18}\)
\(x=\dfrac{17}{7}\)
a) \(\dfrac{7}{18}\).x-\(\dfrac{2}{3}\)=\(\dfrac{5}{18}\)
\(\dfrac{7}{18}\).x =\(\dfrac{5}{18}\)+\(\dfrac{2}{3}\)
\(\dfrac{7}{18}\).x = \(\dfrac{17}{18}\)
x = \(\dfrac{17}{18}\) :\(\dfrac{7}{18}\)
x =\(\dfrac{17}{7}\)
b)\(\dfrac{4}{9}\) - \(\dfrac{7}{8}\).x =\(\dfrac{-2}{3}\)
\(\dfrac{7}{8}\).x =\(\dfrac{4}{9}\)-\(\dfrac{-2}{3}\)
\(\dfrac{7}{8}\).x =\(\dfrac{10}{9}\)
x =\(\dfrac{10}{9}\) : \(\dfrac{7}{8}\)
x =\(\dfrac{80}{63}\)
c)\(\dfrac{1}{6}\)+\(\dfrac{-5}{7}\): \(\dfrac{-7}{18}\)
\(\dfrac{1}{6}\)+\(\dfrac{90}{49}\)
\(\dfrac{589}{294}\)

a) x= 1/4
b) x= -7/144
c) x= 25/6
d) x=17/7
e) x= 80/63
f) x= -45/14
=18 x (9+2-3+2)
= 18 x 10
=180
TL:
\(\text{18 x 9 + 18 x 2 - 18 x 3 + 18 x 2}\)
\(=18\times\left(9+2-3+2\right)\)
\(=18\times10\)
\(=180\)
HT
@@@@@