720 : [41-(2x-5)]=22.5 15-x=7- (-2) [230- (15-5x)].3=390
bài 1 tìm x biết
128-3(x+4)=23
[(14x+26)-3+55]/5=35
(x+12)^2.(x-1)=0
720/[41-(2x-5)]=22.5
720 ; {41-(2x - 5) } = 23.5
2x.4=128
x15=x
(2x + 1)3=125
(x+15)-125=57 : 55
720: [ 41-( 2x - 5 )= 23 .5
27- 3 ( x + 4 ) =23
2015x . 53 = 125
Tìm x thuộc Z
a. 720 : [ 41 - ( 2x - 5 ) ] = 2^3 . 5
b. ( 3x - 2^4 ) . 7^4 = 2.7^5
[(10-x).2+51]:3-2=3 (X-12)-15=20-(17+x) 720-[41-(2x-5)]=2( mũ 3). 5 | (2x là 2 nhân x,chấm là dấu nhân X-{57-[42+(-23-x)]}=13-{47+[25-(32-x)]}
Tìm x, biết :
a) 71 + ( 26 - 3x ) : 5 = 75
b) 20 - [ 7 ( x - 3 ) + 4 ] = 2
c) 3x . 2 + 15 = 33
d) 720 : 14 [ 41 - ( 2x - 5 ) ] = 23 . 5
Tìm x
720 : [41-(2x-5)] =2^3 . 5
2^x = 15 = 17
(7x-11)^3= 2^5.5^2+200
tìm x
720 : [41 - (2x - 5)] = 23 .5
(3x - 24).73 = 2.74