tìm x :
a) 504 : ( 16 - 3 x X ) = 72 d) 272 - (4 x X + 15) = 45
Tìm số tự nhiên x biết:
a) 504 : (16 – 3x) = 72
b) 272 – (4x+15) = 45
c) (x : 23 + 45).67 = 8911
d) [(x+32) – 17].2 = 42
Tìm số tự nhiên x biết:
a) 504 : 16 - 3 x = 72
b) 272 - 4 x + 15 = 45
c) x : 23 + 45 . 67 = 8911
d) x + 32 - 17 . 2 = 42
504 : [ 16 - 3 . x ] = 72
272- [4 . x + 15 ] =45
425 - x :8 = 91
293 - 8.27 + x . 25 = 80
dấu chấm là nhân nha !!!
Các bạn làm nhanh nhất mình tick cho !!!!
a,504:[16-3.x]=72
16-3.x=504:72
16-3.x=7
3.x =16-7
3.x =9
\(\Rightarrow x=3\)
b,272-[4.x+15] = 45
4.x+15 = 272-45
4.x+15 = 227
4.x = 227-15
4.x = 212
x = 212:4
\(\Rightarrow x=53\)
c,425-x:8 =91
x:8 =425-91
x:8 =334
x =334x8
\(\Rightarrow x=2672\)
d, 293-8.27+x.25=80
293-216 +x.25=80
77+x.25 =80
x.25 =3
\(\Rightarrow x=\frac{3}{25}\)
x = 3
x = 53
x = 2672
x = 3 / 25
ai thấy đúng thì ủng hộ mk nha
504:[16-3x]=72
16-3x=504:72
16-3x=7
3x=16-7
3x=9
x=9:3
x=3
Vậy x=3
272-(4x+15)=45
4x+15=272-45
4x+15=227
4x=227-15
4x=212
x=212:4
x=53
Vậy x=53
425-x:8=91
x:8=425-91
x:8=334
x=334.8
x=2672
Vậy x=2672
293-8.27+x.25=80
77+x.25=80
x.25=80-77
x.25=3
x=3:25
x=\(\frac{3}{25}\)
Vậy x=\(\frac{3}{25}\)
Bài 4 tìm x
a ) X 36 = 972
b ) ( X - 47 ) x 21 = 840
c ) X x 22 + X x 50 = 504
d ) 254 : x = 14 ( dư 16 )
e ) 729 : X = 81
f ) y x 15 + y x 13 = 560 x 45
giúp em với !
Có ngay nè e
a. X x 36 =972
X = 972 : 36
X = 27
b. ( X - 47) x 21 = 840
X - 47 = 840 : 21
X - 47 = 40
X = 40 + 47
X = 87
c. X x 22 + X x 50 = 504
X x ( 22 + 50) = 504
X x 72 = 504'
X = 504 : 72
X = 7
d.254 : x = 14 ( dư 16)
X = ( 254 - 16) : 14
X = 238 : 14
X = 17
e. 729 : X = 81
X = 729 : 81
X = 9
f. y x 15 + y x 13 = 560 x 45
y x 15 + y x 13 = 25 200
y x ( 15 + 13 ) = 25 200
y x 28 = 25 200
y = 25 200 : 28
y = 900
Có sai ở đâu thông cảm cho a nhé, Dài quá e ạ
272 + ( 146 - x ) = 118
504 : ( 16 - 3x ) = 72
Tham khảo :
\(272+\left(146-x\right)=118\)
\(146-x=118-272\)
\(146-x=-154\)
\(x=146-\left(-154\right)\)
\(\Rightarrow x=300\)
\(504:\left(16-3x\right)=72\)
\(16-3x=504:72\)
\(16-3x=7\)
\(3x=16-7\)
\(3x=9\)
\(x=9:3\)
\(\Rightarrow x=3\)
1=> 146-x=-154
=>x=300
2> =>16-3x=7
=>3x=9
=>x=3
a, 272 + ( 146 - x ) = 118
146 - x = 118 - 272
146 - x = -154
x = 146 - ( -154 )
x = 300
Vậy....
b, 504 : ( 16 - 3x ) = 72
16 - 3x = 7
3x = 16 - 7
3x = 9
x = 3
Vậy.....
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
272+ ( 146 + x ) = 118
272 - ( 4.x + 15 ) = 45
x - 36 : 18 = 16
#Rin
\(272+\left(146+x\right)=118\)
\(272+146+x=118\)
\(418+x=118\)
\(x=118-418\)
\(x=-300\)
Bài làm
a) 272+ ( 146 + x ) = 118
146 + x = 272 - 118
146 + x = 154
x = 154 - 146
x = 8
Vậy x = 8
b) 272 - ( 4.x + 15 ) = 45
4x + 15 = 272 - 45
4x + 15 = 227
4x = 227 - 15
4x = 112
x = 112 : 4
x = 28
Vậy x = 28
c) x - 36 : 18 = 16
x - 2 = 16
x = 18
Vậy x = 18
# Học tốt #
1>=> 146+x=-154
=>x=-300
2> => 4x+15=227
=>4x=212
=>x=53
37>=> x- 2=16
==>x=18
504 - ( 16 - 3 . x ) = 72
mình đang cần rất gấp
504 : ( 16 - 3 . x ) = 72
( 22 . x - 52 ) . 38 = 39
\(\Rightarrow16-3x=504:72=7\\ \Rightarrow3x=16-7=9\Rightarrow x=3\\ \left(2^2\cdot x-5^2\right)\cdot3^8=3^9\\ \Rightarrow4x-25=3^9:3^8=3\\ \Rightarrow4x=28\Rightarrow x=7\)
504 : (16 - 3x) = 72 (ĐK: \(x\ne\dfrac{16}{3}\))
<=> 16 - 3x = 504 : 72
<=> 16 - 3x = 7
<=> 16 - 7 = 3x
<=> 3x = 9
<=> x = 3 (tM)
(22x - 52) . 38 = 39
<=> (4x - 25) . 6561 = 19683
<=> 4x - 25 = 19683 : 6561
<=> 4x - 25 = 3
<=> 4x = 3 + 25
<=> 4x = 28
<=> x = 7