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TP
1
18 tháng 10 2018
b) 53 . 93 + 47 . 93 - 79 . 62 - 38 . 79
= 93 . ( 47 + 53) . 79 . ( 62 - 38 )
= 93 . 100 . 79 . 24
= 9300 . 1896
= 17632800
NA
31 tháng 10 2021
a.219 - 7(x+1) = 100
7(x+1) = 219 - 100
7(x+1) = 119
x + 1 = 119 : 7
x + 1 = 17
x = 17 - 1
x = 16
b. (3x - 6 ) . 3 = 36
3x - 6 = 36 : 3
3x - 6 = 12
3x = 12 + 6
3x = 18
x = 18 : 3
x = 6
c.716 - ( x-143) = 659
x-143 = 716 - 659
x-143 = 57
x = 57 + 143
x = 200
b. 30 - [4(x-2)+15] = 3
4(x-2) + 15 = 30 - 3
4(x-2)+15 = 27
4(x-2) = 27 - 15
4(x-2) = 12
x-2 = 12 : 4
x-2 = 3
x = 2 + 3 = 5
e.[(8x - 12) : 4] .33 = 36
[(8x - 12) : 4] . 27 = 729
(8x - 12) : 4 = 729 : 27 = 27
8x - 12 = 27 . 4 = 108
8x = 108 + 12 = 120
x = 120 : 8 = 15
31 tháng 10 2021
a) \(\Leftrightarrow7\left(x+1\right)=119\\ \Leftrightarrow x+1=17\\ \Leftrightarrow x=16\)
b) \(\Leftrightarrow9\left(x-2\right)=36\\ \Leftrightarrow x-2=4\\ \Leftrightarrow x=6\)
c) \(\Leftrightarrow x-143=57\\ \Leftrightarrow x=200\)
d) \(\Leftrightarrow4\left(x-2\right)+15=27\\ \Leftrightarrow4\left(x-2\right)=12\\ \Leftrightarrow x-2=3\\ \Leftrightarrow x=5\)
e) \(\Leftrightarrow\left(2x-3\right).4:4=3^3\\ \Leftrightarrow2x-3=27\\ \Leftrightarrow2x=24\\ \Leftrightarrow x=12\)
HN
1
18 tháng 12 2017
\(27.77+24.27-27\)
\(=27.\left(77+24-1\right)\)
\(=27.100\)
\(=2700\)
\(174\div\left\{2\left[36+\left(4^2-23\right)\right]\right\}\)
\(=174\div\left\{2\left[36+\left(16-23\right)\right]\right\}\)
\(=174\div\left\{2\left[36+\left(-7\right)\right]\right\}\)
\(=174\div\left\{2.29\right\}\)
\(=174\div58\)
\(=3\)
\(3^2.4-\left[30-\left(5-2\right)^2\right]\)
\(=9.4-\left[30-3^2\right]\)
\(=36-\left[30-9\right]\)
\(=36-21\)
\(=15\)
18 tháng 12 2022
=174:{2[36+(16-23)]}
=174:{2[36+(-7)]}
=174:{2x29}
=174:58
=3
4 tháng 12 2019
174:{2[36+(4^2-23)]}
=174:{2[36+(-7)]}
=174:{2.29}
=174:58
=3
4 tháng 12 2019
\(174:\left\{2.\left[36+\left(4^2-23\right)\right]\right\}\)
\(=174:\left\{2.\left[36+\left(16-23\right)\right]\right\}\)
\(=174:\left\{2.\left[36+\left(-7\right)\right]\right\}\)
\(=174:\left\{2.29\right\}\)
\(=174:58\)
\(=3\)
17 tháng 7 2015
Ta có 174 : {2.[36 + (42 - 2.3)]}
= 174 : {2.[36 + 10]}
= 174 : (2 . 46)
= 174 : 92
= \(\frac{87}{46}\)
17 tháng 7 2015
174 : {2.[36 + (42 - 23)]}
= 174 : {2.[36 + (-7)]}
= 174 : (2 . 29)
= 174 : 58
= 3
HT
17 tháng 7 2015
174 : {2.[36 + (44 - 23)]}
= 174 : {2.[36+(-7)]}
= 174 : {2. 29}
= 174 : 58
= 3
17 tháng 7 2015
Ta có 174 : {2.[36 + (42 - 23)]}
= 174 : {2.[36 + (-7)]}
= 174 : (2 . 29)
= 174 : 58
= 3
{143-[(36:4+14]}.27:36+174
{143-[(9+14)]}.27:36+174
{143-23}.27:36+174
120.27:36+174
3240:36+174
90+174
264
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