88-3x(7+x )=64
131x x- 941=128x8
Tìm x
a)131.x-941=32
b)88-(7+x).3=64
c)51+(26-3x):5=55
a)131.x-941=32
131x=32+941=973
x=973:131
=973/131
b.88-(7+x).3=64
(7+x).3=88-64=24
7+x=24:3=8
x=8-7
x=1
c)51+(26-3x):5=55
(26-3x):5=55-51=4
26-3x=4.5=20
2x=26-20=6
x=6:3=2
a) 131 . x - 941 = 32
131 . x = 32 + 941
131 . x = 973
x = 973 : 131
x = 973/131
a) 131 . x - 941 = 32
131 . x = 32 + 941
131 . x = 973
x = 973 : 131
x = 973/131
131 x X -94=128x8
131 \(\times\) \(x\) - 94 = 128 \(\times\) 8
131 \(\times\) \(x\) - 94 = 1024
131 \(\times\) \(x\) = 1024 + 94
131 \(\times\) \(x\) = 1118
\(x\) = 1118 : 131
\(x\) = \(\dfrac{1118}{131}\)
1) Tìm x:
a) 88 - 3 ( 7 + x ) = 64 b) 131 . x - 941 = 27. 23
c) [ ( x + 32 ) - 17 ] : 2 = 42 d) [ ( x2 + 54 ) - 32 ] : 2 = 61
\(a)88-3(7+x)=64\) \(c)[(x+32)-17]\div2=42\)
\(\Rightarrow3(7+x)=88-64\) \(\Rightarrow(x+32)-17=42.2\)\(\Rightarrow x+32-17=84\)
\(\Rightarrow3(7+x)=24\) \(\Rightarrow x=84+17-32\)
\(\Rightarrow7+x=24\div3\) \(\Rightarrow x=69\)
\(\Rightarrow7+x=8\)
\(\Rightarrow x=8-7\)
\(\Rightarrow x=1\)
\(b)131.x-941=2^7.2^3\) \(d)[(x^2+54)-32]\div2=61\)
\(\Rightarrow131.x-941=2^{10}\) \(\Rightarrow(x^2+54)-32=61.2\)
\(\Rightarrow131.x=1024+941\) \(\Rightarrow x+54-32=122\)
\(\Rightarrow131.x=1965\) \(\Rightarrow x=122+32-54\)
\(\Rightarrow x=1965\div131\) \(\Rightarrow x=100\)
\(\Rightarrow x=15\)
A) 88-3(7+x)=64
3(7+x)=88-64
3(7+x)=24
7+x=24:3
7+x=8
X=8-7
X=1
[(x+32)-17]:2=42
(X+32)-17=42*2
(X+32)-17=84
X+32=84+17
X+32=101
X =101-32
X=69
câu a 88-3 (7+x) = 64
b, 131x-941=27x23
c, [(x+32)-17]x2 = 42
d , [ (x2+54)-32]:2=61
Bài 3 Tính số số hạng của dãy
1;5;9;.....;2005;2009
Bài 4 : Tính tổng :
9+12+15+...+2007+2010
ai dung se dc tick
131 nhân x - 941 = 2 mũ 7 nhân 2 mũ 3
vì 2^7x2^3=1024
xuy ra 1024-941:131
vậy x=15
\(131\cdot x-941=2^7\cdot2^3\)
131 . x - 941 = 27 . 23
131 . x - 941 = 27+3
131 . x - 941 = 210
131 . x - 941 = 1024
131 . x = 1024 + 941
131 . x = 1965
x = 1965 : 131
x = 15
Vậy x = 15
nhéthien binh cong chua
k mình nhé bạn mình trả lời đầu tiên !
\(\Rightarrow131.x-941=1024\)
\(\Rightarrow131x=1965\)
\(\Rightarrow x=15\)
131 . x - 941 = 2^7 . 2^3
131 . x - 941 = 2^10
131 . x - 941 = 1024
131 . x = 1024 + 941
131 . x = 1965
x = 1965 : 131
x = 15
Tính bằng cách thuận tiện nhất:
a) 36 x 25 x 4
18 x 24 : 9
41 x 2 x 8 x 5
b) 108 x (23 + 7)
215 x 86 + 215 x 14
53 x 128 – 43 x 128
a) 36 x 25 x 4 = 36 x ( 25 x 4) = 36 x 100 = 3600
18 x 24 : 9= 24 x ( 18:9) = 24 x 2 = 48
41 x 2 x 8 x 5= 41 x 8 x ( 5x2) = 41 x 8 x 10 = 3280
b) 108 x (23 + 7)= 108 x 30 = 3240
215 x 86 + 215 x 14 = 215 x ( 86 + 14) = 215 x 100 = 21500
53 x 128 – 43 x 128= 128 x ( 53 - 43) = 128 x 10 = 1280
\(a,35\times25\times4=36\times100=3600\)
\(18\times24:9=18:9\times24=2\times24=48\)
\(41\times2\times8\times5=\left(2\times5\right)\times\left(41\times8\right)=10\times328=3280\)
\(b,108\times\left(23+7\right)=108\times30=3240\)
\(215\times86+215\times14=215\times\left(86+14\right)=215\times100=21500\)
\(53\times128-43\times128=128\times\left(53-43\right)=128\times10=1280\)
các bạn ơi nhớ mình là ai không các bạn hay trả lời câu hỏi của mình đó
1, 99 x 1 =
2, 88 x 2 =
3, 7 x9 x3 x 6 + 2 =
4, 3x + 9 = 0
x = ?
1, 99 x 1 = 99
2, 88 x 2 = 176
3, 7 x 9 x 3 x 6 + 2 = 1136
4, 3x + 9 = 0
3x = 0 - 9
3x = -9
x = ( -9 ) : 3
x = -3
Vậy x = -3
~ Hok tốt ~
#)Giải :
1,99 x 1 = 1,99
2,88 x 2 = 5,76
3,7 x 9 x 3 x 6 + 2 = 601,4
4,3x + 9 = 0
4,3x = 0 - 9
4,3x = -9
x = -9 : 4,3
x = \(\approx\)-2
#~Will~be~Pens~#
Tìm số tự nhiên x biết:
a) x – 32 : 16 = 48
b) 88 – 3.(7+x) = 64
c) (5+4x) : 3 – 121 : 11 = 4
d) 15 – 2(3x+1) = 11.13 – 130
a) x – 32 : 16 = 48 ó x – 2 = 48 ó x = 48 + 2 ó x = 50
b) 88 – 3.(7+x) = 64 ó 3.(7+x) = 88 – 64 ó 7 + x = 24:3 ó x = 8 – 7 ó x = 1
c) (5+4x) : 3 – 121 : 11 = 4 ó (5+4x) : 3 – 11 = 4 ó (5+4x) : 3 = 4 + 11 ó 5+4x = 15.3 ó 4x = 45 – 5 ó 4x = 40 ó x = 10
d) 15 – 2(3x+1) = 11.13 – 130 ó 15 – 2(3x+1) = 143 – 130 ó 15 – 2(3x+1) = 13
ó 2(3x+1) = 15 – 13 ó 3x + 1 = 2:2 ó 3x = 1 – 1 ó 3x = 0 ó x = 0