\(\Rightarrow4^2\left(21-11x\right)=10\cdot4^4\\ \Rightarrow21-11x=10\cdot4^2=160\\ \Rightarrow11x=-139\Rightarrow x=-\dfrac{139}{11}\)
10.42 + 58.68 (21+x) : = 95 : 94
Tim x biet : 20 . 2^x + 1 = 10.4^2 + 1
Tim x : ( 4-x:2)^3 - 1 = 2 . (2^3 - 5 : 2^0 )
tìm số nguyên x,y,z ;
a) 6/5 = 18/x
b) 3/4 = -21/x
c) x/4 = 21/28
d) -8/2x = 3/-9
e) -4/11 = x/22 = 40/z
f) - 3/4 = x/20 = 21 / y
g) -4/8 = x/-10 = -7/y = z/-24
h) x/4 = 9/x
Tính hợp lí :
B= 22/6.32/10.42/15...112/78
C= (3.4.216)2/11.213411-169+ 2015.82/26
21/4.-11/4+21/4.1/2+21/4.-1/2
( x - 1/2 ) : 3/11 =11/4
(2x + 3/8 ) . 7/4 =-21/32
x - x/3 = 3/57 : 12/19
nhanhh giúp tui nha các babee
Tính hợp lý:
a, -3/4 + 3/7 + -1/4 + 4/9 + 4/7
b, -7/9 x 4/11 + -7/9 x 7/11 + 5 và 7/9
c, ( 21/31 + 2013/6039 ) - ( 44/53 - 10/31) - /53
Tim x
a, ( - 14 - x ) + 13 = 5
b, ( 11 + x ) - ( - 11 - 9 ) = 32
c, 5 - ( x - 8 ) + ( - 21 ) = 42
d, - [ 4 - 15 ] - ( - 4 - x = - 45
e, - 23 - ( 10 - x ) = - 50
Tìm số nguyên x, biết: a) 12 + (2x - 11) = 53; b) 21 - (-6+ 3x) = 9 c) - (2x + 4) + 11 = -27; d) 33 - (33 - x) = 0
