\(\left(-11\right)^2\cdot x=\left(-175\right)+\left(-12\right)\cdot\left(-13\right)\cdot x\)
\(121\cdot x=\left(-175\right)+156\cdot x\)
\(121\cdot x-156\cdot x=-175\)
\(-35\cdot x=-175\)
\(x=\left(-175\right):\left(-35\right)=5\)
Vậy x = 5
tim x
( x + 11 ) + ( x + 12 ) + ( x + 13 ) + .... + ( x + 50 ) = 1620
Tìm x biết: 10 + 11 + 12 + 13+ ... + x = 5106.
Bài 1 : a, (-175)-123+3+175+(-3)
b, 17 . 85+15 .17 -150
c, 176: ( 4. 5 mũ 2 - 3 . 2 mũ 2 )
Bài 2 : Tìm số nguyên x biết :
a,8-x = -12
b, 20 +2 mũ 3 . x = 5 mũ 2 . 4
c, 2 | x -1 | +5 =15
Bài 2: Thực hiện phép tính ( hợp lý nếu có thể)
a) 12 x 18 + 14 x 3 - 255 : 17
b) 68 + 42 x 5 - ( 198 : 11 - 8 )
c) 13 + 21 x 5 - ( 198 : 11 - 8 )
d) 18 - 4 x (27 - 90 + 73)
e) 15 x ( 27 + 18 +6 ) + 15 x (23+12)
f) 417 + 235 + 583 + 765
g) 5 + 8 + 11 + 14 + … + 38 + 41
Tìm x, biết:
\(\frac{10^{10}+10^{11}+10^{12}}{13^2+14^2\left(2.3x^{-5}-2^3.3^2\right)}=2.5^2.5\)
(2/11*13+2/13*15+....+2/19*21)-x+221/231=4/3 tim x
Bài 46:
11, - 4|x-2| = -8
12, 5|x+2| = -10(-2)
13, 6|x-2| = 18: (- 3)
14, -7|x+4| = 21 : (-3)
15, 4|x+1| = 8(-2) - 8(-5)
16, 3|x+5| = -9
17, -8|x-3| = 24 - 16: 2
18, -3|x+6| = 6.2 -9
19, 5-|x+7| = 4
20, 12-|x+8| = 10
Giúp mk nha. Mk càn ngay đó
Tính
a, -6/11: ( 3/5 . 4/11)
b, 7/12+5/12:6-14/30
c, ( 4/5 + 1/2 ): ( 3/13-8/13)
d, ( 2/3 -1/4 +5/11):(5/12+1-7/11)
a , 43 + ( 9 - 21 ) = 317 - ( x + 317 )
b , ( 15 - x ) + ( x - 12 ) = 7 - ( -5 + x )
c , x - { 57 - [ 42 + ( -23 - x )]} = 13 - { 47 + [ 25 - ( 32 - x )]}
d , -7 + | x - 4 | = -3
e , 13 - | x + 5 | = 13
g , | x - 10 | - ( -12 ) = 4
h , | x + 2 | < 5
Tìm x biết: (11/12+11/276+11/782+..............+11/8900).x=2/3
