a) 10-{[(x:3+17):10+3.24 ]:10}=5
b) 2448:[119-(x-6)]=24
c)165-(35:x+3).19=13
a)x-280:35=5.54 b)(x-280):35=10 c)2448:[119-(x-6)]=24
1. Tìm X <- N.
a) 3 : ( 2x + 1 ) + 69 = 72
b) 165 - ( 35 : x + 3 ) . 19 = 13
c) { [ ( 2x + 14 ) : 4 - 3 ] : 2 } - 1 = 0
d) 10 - { [ ( x : 3 + 17 ) : 10 + 316 ] : 16 } = 5
a)\(3:\left(2x+1\right)=72-69\)
\(3:\left(2x+1\right)=3\)
\(2x+1=3:3\)
\(2x+1=1\)
\(2x=1-1\)
\(2x=0\)
\(x=0:2\)
\(x=0\)
các bài còn lại giống như câu a nha nếu ko biết thì comment lại minhf sẽ giải cho . Nhớ k cho mình nha
(35:x+3).19=165-13=152
35:x+3=152:19=8
35:x=8-3=5
x=35:5=7
x-(-25+x)=13-x
15-(30+x)=x-(27-|-8|)
(12x-4^3).8^3=4.8^4
[119-(3^3-10)].x=2448
[(10-x).2+51]:3-2=3
(x-12)-15=20-(17+x)
-12-|13-x|=-21
8 bé hơn hoặc bằng|x-6|<9
720-[41-(2x-5)]=2^3.5
mình cần gấp giúp mình với
d,x-(-25+x)=13-x
e, 15-(30+x)=x-(27-|-8|)
f, (12x-4^3).8^3=4.8^4
g, [119-(3^3-10)].x=2448
h, [(10-x).2+51]:3-2=3
i,(x-12)-15=20-(17+x)
k, -12-|13-x|=-21
l, 8 bé hơn hoặc bằng|x-6|<9
m,720-[41-(2x-5)]=2^3.5
d) \(x-\left(-25+x\right)=13-x.\)
\(\Rightarrow x+25+x=13-x\)
\(\Rightarrow x+x+x=13-25\)
\(\Rightarrow3x=-12\)
\(\Rightarrow x=-4\)
e) \(15-\left(30+x\right)=x-\left(27-\text{| }-8\text{| }\right)\)
\(\Rightarrow15-30-x=x-19\)
\(\Rightarrow-15-x=x-19\)
\(\Rightarrow-15+19=x+x\)
\(\Rightarrow4=2x\)
\(x=2\)
f) \(\left(12x-4^3\right).8^3=4.8^4\)
\(\left(12x-2^6\right).2^9=2^2.2^{12}\)
\(12x-2^6=2^2.2^{12}\div2^9\)
\(12x-64=2^5=32\)
\(12x=96\)
\(x=8\)
g) \(\left[119-\left(3^3-10\right)\right].x=2448\)
\(\left[119-\left(27-10\right)\right].x=2448\)
\(\left[119-17\right].x=2448\)
\(102.x=2448\)
\(x=24\)
h)
[( 10 - x ) .2-51] : 3 - 2 = 3
[( 10 - x ) .2-51] : 3 = 3 + 2
[( 10 - x ) .2-51] : 3 = 5
( 10 - x ) .2 - 51 = 5 . 3
( 10 - x ) . 2 - 51 = 15
( 10 - x ) . 2 = 15 + 51
( 10 - x ) . 2 = 66
10 - x = 66 : 2
10 - x = 33
x = 10 - 33
x = -23
i)
(x-12)-15 = (20-7)-(18+x)
x-12-15 = 20-7-18-x
x-27 = -5-x
=> x-27+5+x = 0
2x-25 =0
2x = 0+25 = 25
k)
bạn ơi từ câu k mình ko thấy bạn viết gì
1) [(x+32)-17].2=42
2) 44=7.x=103:10
3) 128-3(x+4)=23
4) (6x-33).53=3.54
5) [(6x-72):2-84].28=5628
6) 2448:[119-(x-6)]=24
a,-8/3+7/5+-71/15<x<-13/7+19/14+-7/2
b,-19/6+-15/2+11/3<x<-5/4+19/12+-10/3
c,-6/7+3/35<x<-2/5+3/7
d,x=3/4+1/-12
e,x/14=1/7+-3/14
f,11/18+13/6=85/x
g,8/17+5/17<x/17<6/17+9/17
Thực hiện phép tính:
a, (8.5^7 - 5^5 +5^6) : 5^5
b, (9^30 - 27^19) : 3^57 + (125^9 - 25^12) : 5^24
c, (10^12 + 5^11 . 2^9 - 5^13 - 2^8) : 4 . 5^5 . 10^6
a: Ta có: \(\left(8\cdot5^7+5^6-5^5\right):5^5\)
\(=8\cdot5^2+5-1\)
\(=200+4=204\)
b: Ta có: \(\left(9^{30}-27^{19}\right):3^{57}+\left(125^9-25^{12}\right):5^{24}\)
\(=3^{60}:3^{57}-3^{57}:3^{57}+5^{27}:5^{24}-5^{24}:5^{24}\)
\(=27-1+125-1\)
=150
a. (8,57 - 55 + 56) : 55
= (8,57 : 55) - (55 : 55) + (56 : 55)
= 1,72 - 1 + 5
= 2,89 - 1 + 5
= 6,89
b. (930 - 2719) : 357 + (1259 - 2512) : 524
= (930 : 357) - (2719 : 357) + (1259 : 524) - (2512 : 524)
= 33 - 1 + 125 - 1
= 27 - 1 + 125 - 1
= 150
c. (1012 + 511 . 29 - 513 - 28) : 4 . 55 . 106
= (1012 + 2,5 , 1010 - 513 - 28) : 1,25 . 1010
= (1012 : 1,25 . 1010) + (2,5 . 1010 : 1,25 . 1010) - (513 : 1,25 . 1010) - (28 : 1,25 . 1010)
= 80 + 2 - \(\dfrac{25}{256}\) - \(\dfrac{1}{48828125}\)
= 81,90234373 \(\approx\) 82
Bài 1:Thực hiện phép tính
a. 45x48-90x24+145
b. 23x157+15x46-23x87
c. 27x(13+48)+27x(22+17)
d. 1+3+5+7+..+2017
e. 1+2+2^3+2^4+...2^2017
g. 1x2+2x3+3x4+.. +2017x2018
Bài 2:Tìm x
a. 2x-(1309:11-19)-2=10
b. 165-(35:x+3).15=15
c. 3x+15.4=6(19-x)
d. 4^x+1=64
e. (4^x-1)^2=259
Bài 3:So sánh
a. 13^40 và 2^161
b. 5^257 và 119^72
Ai làm đc bài nào thì giúp mik vs nah
r mik tick đúng cho
a,45x48-90x24+145
=45x48-(45x2x24)+145
=45x48-45x48+145
=0+145
=145
b,23x157+15x46-23x87
=23x87+23x70+15x46-23x87
=23x87-23x87+23x70+15x46
=0+23x70+(15x23x2)
=23x70+23x30
=23x(70+30)
=23x100
=2300
a) 165-(35:x+3)*15=15
b) (1*3/10-x):(19/10-1-2/5)+4/5=1
giúp mk giải câu này nhé!!!
a) => (35:x+3)*15 = 165-15=150
=> 35:x+3 = 150:15=10
=> 35:x = 10-3 = 7
=> x = 35:7 = 5
b) => 1*3/10x :1/2 +4/5 =1
=> 1*3/10x:1/2 =1-4/5=1/5
=> 1*3/10x = 1/5 *1/2 =1/10
=> 3/10-x = 1/10
=> x = 3/10 - 1/10 = 2/10 = 1/5