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\(8x+32=40\Rightarrow8x=8\Rightarrow x=1\\ 216-11x=95\Rightarrow11x=121\Rightarrow x=11\\ \left(x+72\right)-184=0\Rightarrow x+72=184\Rightarrow x=112\\ 289-\left(x+167\right)=65\Rightarrow x+167=224\Rightarrow x=57\)
8 . x + 32 = 40
8 . x = 40 - 32
8 . x = 8
x = 8 : 8
x = 1
216 -11x = 95
11x = 216 - 95
11x = 121
x = 121 : 11
x = 11
( x + 72 ) - 184 = 0
x + 72 = 0 + 184
x + 72 = 184
x = 184 - 72
x = 112
289 - ( x + 167 ) = 65
x + 167 = 289 - 65
x + 167 = 224
x = 224 - 167
x = 57
1: x=7+5=12
2: =>-29-x=-10
=>x+29=10
=>x=-19
3: =>x+7=-18
=>x=-25
4: =>x+19-11=0
=>x+8=0
=>x=-8
Giải;
1) \(347.222-222.\left(216+184\right):8\)
\(=347.222-222.400:8\)
\(=347.222-222.50\)
\(=222.\left(347-50\right)\)
\(=222.297\)
\(=65934\)
2) \(132-\left[116-\left(132-128\right).22\right]\)
\(=132-\left[116-4.22\right]\)
\(=132-\left[116-88\right]\)
\(=132-28\)
\(=104\)
3) \(16:\left\{400:\left[200-\left(37+46.3\right)\right]\right\}\)
\(=16:\left\{400:\left[200-\left(37+138\right)\right]\right\}\)
\(=16:\left\{400:\left[200-175\right]\right\}\)
\(=16:\left\{400:25\right\}\)
\(=16:16\)
\(=1\)
4) \(\left\{184:\left[96-124:31\right]-2\right\}.3651\)
\(=\left\{184:\left[96-4\right]-2\right\}.3651\)
\(=\left\{184:92-2\right\}.3651\)
\(=\left\{2-2\right\}.3651\)
\(=0.3651\)
\(=0\)
5) \(46-\left[\left(16+71.4\right):15\right]-2\)
\(=46-\left[\left(16+284\right):15\right]-2\)
\(=46-\left[300:15\right]-2\)
\(=46-20-2\)
\(=24\)
6) \(3^3.18+72.4^2-41.18\)
\(=18.\left(27-41\right)+72.16\)
\(=18.-14+1152\)
\(=-252+1152\)
\(=900\)
Giải: (tiếp)
7) \(\left(56.46-25.23\right):23\)
\(=\left(2576-575\right):23\)
\(=2001:23\)
\(=87\)
8) \(\left(28.54+56.36\right):21:2\)
\(=\left(1512+2016\right):21:2\)
\(=3528:21:2\)
\(=84\)
9) \(\left(76.34-19.64\right):\left(38.9\right)\)
\(=\left(2584-1216\right):342\)
\(=1368:342\)
\(=4\)
10) \(\left(2+4+6+...+100\right).\left(36.333-108.111\right)\)
\(=\left(2+4+6+...+100\right).\left(11988-11988\right)\)
\(=\left(2+4+6+...+100\right).0\)
\(=0\)
11) \(\left(5.4^{11}-3.16^5\right):4^{10}\)
\(=5.4^{11}:4^{10}-3.16^5:4^{10}\)
\(=5.4-3.1\)
\(=20-3\)
\(=17\)
12) \(7256.4375-725:3650+4375.7255\)
\(=4375.\left(7256+7255\right)-\dfrac{29}{146}\)
\(=4375.14511-\dfrac{29}{146}\)
\(=63485624,8\)
Câu 12 ko chắc!
Trl :
107 x 112 - 14 x 56
= 107 x 2 x 56 - 14 x 56
= 214 x 56 - 14 x 56
= ( 214 - 14 ) x 56
= 200 x 56
= 11200
Hok tốt
107 x 112 - 14 x 56
= 107 x 2 x 56 - 14 x 56
= 214 x 56 - 14 x 56
= ( 214 - 14 ) x 56
= 200 x 56
= 11200
#ParkJimin
a) - 2 < x < 3 = > x ∈ {0;1;2}
b) 25 32 < x < 4 => x ∈ {1;2;3}
c) – 5 < x < - 2 = > x = ∅
a, (x + 30) – 75 = 125
=> x + 30 = 125 + 75 = 200
=> x = 200 – 30
=> x = 170
Vậy x = 170
b, x – 72 : 36 = 18
=> x – 2 = 18
=> x = 18 + 2 = 20
Vậy x = 20
c, x – 17 = 54
=> x = 54 +17
=> x = 71.
Vậy x = 71
d, 36 – (x – 2) = 12
=> x – 2 = 36 – 12
=> x = 24 + 2 = 26
Vậy x = 26
e, 9x – 7 = 837
=>9x = 837 + 7 = 844
=> x = 844 9
Vậy x = 844 9
f, (x – 15) – 107 = 0
=> x – 15 = 107
=> x = 107 +15
=> x = 122.
Vậy x = 122
g, 134 + (116 – x) = 145
=> 116 – x = 145 – 134
=> x = 116 – 11
=> x = 5.
Vậy x = 5
\(241+\left(107-x\right)=260\)
\(107-x=260-241\)
\(107-x=19\)
\(x=107-19\)
\(x=88\)
\(\left(x-72\right)-184=56\)
\(x-72=56+184\)
\(x-72=240\)
\(x=240+72\)
\(x=312\)
a) 241+(107-x) = 260
107-x = 19
x = 88
b) (x + 72)-184 = 56
x + 72 = 240
x = 168