198 - ( x + 4 ) = 120
2 x ( x - 51 ) = 2 x 2^3 + 20
200 - ( 2 x + 6 ) = 4^3
2/3*x-(1/2-3/4+5/6-7/8+...+197/198-199/200)=1/51+1/52+1/53+...+1/99+1/100
Tìm x
viết có chắc chữ giải mà cũng đúng thật vô lý
a) 45 – (x + 9) = 6
b) 89 – (73 – x) = 20
c) (x + 7) – 25 = 13
d) 198 – (x + 4) = 120
e) 2(x- 51) = 2.23 + 20
f) 450 : (x – 19) = 50
4(x – 3) = 72 – 110
\(a,\Leftrightarrow x+9=39\Leftrightarrow x=30\\ b,\Leftrightarrow73-x=69\Leftrightarrow x=4\\ c,\Leftrightarrow x+7=38\Leftrightarrow x=31\\ d,\Leftrightarrow x+4=178\Leftrightarrow x=174\\ e,\Leftrightarrow2\left(x-51\right)=16+20=36\Leftrightarrow x-51=18\Leftrightarrow x=69\\ f,\Leftrightarrow x-19=9\Leftrightarrow x=28\\ g,\Leftrightarrow4\left(x-3\right)=49-1=48\Leftrightarrow x-3=12\Leftrightarrow x=15\)
a) 45 - ( x + 9 ) = 6
45 - x = 6 + 9
45 - x = 15
x = 45 - 15
x = 30
b) 89 - ( 73 - x ) = 20
89 - x = 20 + 73
89 - x = 93
x = 93 - 89
x = 4
c) 198 - ( x + 4 ) = 120
198 - x = 120 + 4
198 - x = 124
x = 198 - 124
x = 74
d) ( x + 7 ) - 25 = 13
x - 25 = 13 + 7
x - 25 = 20
x = 20 + 25
x = 45
e) 2 ( x - 51 ) = 2.23 + 20
2 ( x - 51 ) = 64 + 20
2 ( x - 51 ) = 84
x - 51 = 84 - 2
x - 51 = 82
x = 82 + 51
x = 133
f) 450 : ( x - 19 ) = 50
450 : x = 50 - 19
450 : x = 41
x = 450 : 41
x = 24
TÌM X THEO CÁCH NHANH NHẤT
(x+1)+(x+4)+(x+7)+....+(x+103)=1995.
x+2*x+3*x+4*x+.......+100*x=20200
(x+1)+(x+4)+(x+7)+....+(x+103)=1995.
x + ( 1 + 103 ) x 34 : 2 = 1995
x + 1768 = 1995
x = 1995 - 1768
x = 227
a) = x + 1 + x + 4 + x + 7 + ....+ x + 103 = 1995
= (x + x + ... + x )( 35 số x) + ( 1 + 4 + 7 +...+ 103) = 1995
= 35 nhân x + 1820 = 1995
35 nhân x = 175
x = 175 : 35
x = 5
Tìm x, biết:
a. 3 x X + 27 - 2 x ( X - 4 ) = - 13 x 195 + 13 x 95
b. ( x - 1 ) + ( x - 2 ) + ... + ( x - 100 ) = 2750
c. -2 x ( X + 4 ) - 2^6 : 4^2 = 198
a: =>3x+27-2x+8=-13*100=-1300
=>x+35=-1300
=>x=-1335
b: =>100x-5050=2750
=>100x=2750+5050=7800
=>x=78
c: =>-2x-8-64:16=198
=>-2x=210
=>x=-105
Tìm x, biết:
a) 198 - ( x + 4 ) = 120
b) 2(x-51) = 2.23 + 20
c) 450 : ( x - 19 ) = 50
d)4(x-3) = 72 - 110
Tìm x, biết:
a) 198 - ( x + 4 ) = 120
(x+4) = 198-120
x+ 4 =78
x= 78 - 4
x= 74
b) 2(x-51) = 2.23 + 20
2(x-51)=36
x-51 = 36:2
x-51=18
x=18+51
x=69
c) 450 : ( x - 19 ) = 50
x-19= 450:50
x-19=9
x=9+19
x=28
d)4(x-3) = 72 - 110
4(x-3) =48
x-3 = 48:4
x-3=12
x=12+3
x=15
a) 198 - ( x + 4 ) = 120
=>x+4=78
=>x=744
b) 2(x-51) = 2.23 + 20
=>
a) 198 - ( x + 4 ) = 120
x + 4 = 198 - 120
x + 4 = 78
x = 78 - 4
x = 74
b) 2 ( x - 51 ) = 2 . 23 + 20
2 ( x - 51 ) = 24 + 20
2 ( x - 51 ) = 16 + 20
2 ( x - 51 ) = 36
x - 51 = 36 : 2
x - 51 = 18
x = 18 + 51
x = 69
c) 450 : ( x - 19 ) = 50
x - 19 = 450 : 50
x - 19 = 9
x = 9 + 19
x = 28
d) 4 ( x - 3 ) = 72 - 110
4 ( x - 3 ) = 49 - 1
4 ( x - 3 ) = 48
x - 3 = 48 : 4
x - 3 = 12
x = 12 + 3
x = 15
Nhiều quá mk sợ mk làm sai, bn kiểm tra lại nha, nếu đúng thì t.i.c.k nhé !
Tìm số nguyên x, biết:"
a) 3.(2x+4)+198=(-3)2.10
b) 2.(x+7)-6=18
c) 5.(x+5)-3.(x-2)=52+18
d) 4.(x-2)+5=2.(x-3)-5
Làm 1 câu thôi cũng đc ạ!
a, 3.(2\(x\) + 4) + 198 = (-3)2.10
3.(2\(x\) + 4) + 198 = 90
3.(2\(x\) + 4) = 90 - 198
3.(2\(x\) + 4) = - 108
2\(x\) + 4 = -108 : 3
2\(x\) + 4 = -36
2\(x\) = - 36 - 4
2\(x\) = - 40
\(x\) = -40 : 2
\(x\) = - 20
b, 2.(\(x\) + 7) - 6 = 18
2.(\(x\) + 7) = 18 + 6
2.(\(x\) + 7) =24
\(x\) + 7 = 24 : 2
\(x\) + 7 = 12
\(x\) = 12 - 7
\(x\) = 5
c, 5.(\(x\) + 5) - 3.(\(x\) - 2) = 52 + 18
5\(x\) + 25 - 3\(x\) + 6 = 25 + 18
2\(x\) + 31 = 43
2\(x\) = 43 - 31
2\(x\) = 12
\(x\) = 12 : 2
\(x\) = 6
Tìm x: \(\dfrac{1+3+5+...+199}{2+4+6+...+198+x}\)=1
Tìm x:
a) (x+3)/200 + (x+4)/199 + (x+5)/198= -3
b) (x+4)/2000 + (x+6)/999 + (x+2)/499 +7= 0
c) | x-4 | - | 2x-1 |= 6
Cho mk cả cách giải nha
Tìm x:
a) (x+3)/200 + (x+4)/199 + (x+5)/198= -3
b) (x+4)/2000 + (x+6)/999 + (x+2)/499 +7= 0
c) | x-4 | - | 2x-1 |= 6
Tìm x :
1313 x 1414 - 1414 x X = 1414 x 13
( 1 x 2 + 2 x 3 + 3 x 4 + ...+ 50x 51 ) x X = 2 x 4 + 4 x 6 + 6 x 8 + ...+ 100 x 102
X x ( X + 5 ) - 7 x ( X + 5 ) = 0