(2,4*x-36):(1+5/7)=-14
(2,4*x-36): 12/7 =-14
2,4*x-36= -14*12/7
2,4*x-36= -4
2,4*x= -4+36
2,4*x= 32
x=32:2,4
x= 40/3 vậy x= 40/3
Tick nha
(2,4*x-36):(1+5/7)=-14
(2,4*x-36): 12/7 =-14
2,4*x-36= -14*12/7
2,4*x-36= -4
2,4*x= -4+36
2,4*x= 32
x=32:2,4
x= 40/3 vậy x= 40/3
Tick nha
1. | 4-2x | . 1/3 = 1/3
2. (-3)² : | x+(-1) | = (-3)
3. | 3/2 -x | + (-4/5) = -14/5
4. (-4/3) - | 2x + (-1) | = -7/3
5. -9 . | 36 - x/2 | = (-54)
6. 0,75 - | (-x) + 1/3 | = 0,25
7. (-6/5) + | x-9 |= (-6/5)
8. (-4) . | 3x - 1/5 | = 12
1/Tim x,y
a) (x-8) (y+7)
b)(x-5) (y-9)=-1
c)xy+14+2x+7y=-3
2.tính hợp lý
A=-8).25.(-2).4.(-5).125
B=(-48).72+36.(-304)
C=139.(-47)+37.47
Gíup mừn nha.Camon *hôn hôn*
Tinh gia tri cua cac bieu thuc sau theo 1 cach hop li
a, A= 1/3 × -6/13 × -9/10 × -13/36
b, B= -1/3 × -15/17 × 34/45
c, C=1/3 × 4/5 + 1/3 × 6/5 + 2/3
d, D= -5/6 × 4/19 + -7/12 × 4/19 - 40/57
e, E= 3/7 × 9/26 - 1/14 × 1/13 - 1/7
a) (1/3)^x = 1/729
b) (1/3-1/2)^x-1 = 1/36
c) 25/5^x =1/125
d) (-7)^2n-1/49 = -343
Trong bài phép chia phân số (Chương trình VNEN)
Tìm x
a ) 4/9.x = 1/9
b) 7/18 . x - 2/3 = 5/18
c) x:-1/12 = 7/12
d) 4/9- 7/8.x = -2/3
e) -5/14 : x = -3/10
g) 1/6 + -5/7 : x = -7/18
tìm x biết (x+1/1.3).(1+1/2.4). (1+1/3.5)...........(1+1/x.(x+2))=4016/2007
Tìm x, biết: a)(x-3)-9.(2x-7)=-16:2 b) -2.(-1+x)+5.(-2+x)=-14+x. Thanks mọi người nhìu nhìu <3
Rút gọn :
A = \(\dfrac{6^{12}.3^3.5-7.9^7.2^{13}}{2.4^7.5-2^{14}.3^2}\)
hoàn thành các phép tính sau
a) tính tổng \(2\dfrac{3}{4}\) +\(5\dfrac{7}{9}\)
cách 1
\(2\dfrac{3}{4}+5\dfrac{7}{9}=\dfrac{...}{4}+\dfrac{...}{9}\)
\(=\dfrac{99}{36}+\dfrac{...}{36}\)
\(=\dfrac{...}{36}=...\)
cách 2
\(2\dfrac{3}{4}+5\dfrac{7}{9}=2\dfrac{...}{36}+5\dfrac{...}{36}\)
=\(7\dfrac{...}{36}=8\dfrac{...}{36}\)