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a)
7x - 2x = 617 : 615 + 44 : 11
=> 5x = 62 + 4
=> 5x = 36 + 4
=> 5x = 40
=> x = 40 : 5
=> x = 8
Vậy x = 8
b)
2x+1 . 22014 = 22015
=> 2x+1 = 22015 : 22014
=> 2x+1 = 21
=> x+1 = 1
=> x = 1-1
=> x = 0
c)
\(|\)x-2\(|\) = 0
=> x-2 = 0
=> x = 0+2
=> x = 2
\(7x-2x=6^{17}:6^{15}+44:11\)
\(\Rightarrow5x=6^2+4\)
\(\Rightarrow5x=36+4=40\)
\(\Rightarrow x=40:5\)
\(\Rightarrow x=8\)
k) \(2x-49=5.3^2\)
\(2x-49=45\)
\(2x=49+45\)
\(2x=94\)
\(x=47\)
l) \(3^2.\left(x+14\right)-5^2=5.2^2\)
\(9.\left(x+14\right)-25=20\)
\(9.\left(x+14\right)=45\)
\(x+14=5\)
\(x=-9\)
m) \(6x+x=5^{11}:5^9+3^1\)
\(7x=5^{11-9}+3\)
\(7x=5^2+3\)
\(7x=28\)
\(x=4\)
n) \(7x-x=5^{21}:5^{19}+3.2^2-\left(-7^{-0}\right)\)
\(6x=5^{21-19}+12-1\)
\(6x=5^2+11\)
\(6x=36\)
\(x=6\)
o) \(7x-2x=6^{17}:6^{15}+44:11\)
\(5x=6^{17-15}+4\)
\(5x=6^2+4\)
\(5x=40\)
\(x=8\)
o)7x-x=521:519+3.22-70
=> 6x = 5^2 + 12 -1
=> 6x = 36
=> x = 36/6 = 6
Kết quả 6
Học tốt
\(\text{7x - x = 5}^{21}:5^{19}+3.2^2-7^0\)
\(\text{(7-1)x=5}^2\text{ + 3. 4 - 1}\)
\(\text{6x = 25 + 12 - 1}\)
\(\text{6x = 36}\)
\(\text{ x = 6}\)
a)7.x-x=521 :519 +3.22 -70
x.(7-1)=52+12-1
x.6 =36
x =36:6=6
b)7.x-2.x=617:615+44:11
x.(7-2)=62+4
x.5 =40
x=40:5=8
a) 2x - 15 = 17
2x = 25
b) ( 7x - 11 )3 = 25. 52 + 200
(7x - 11)3 = 32 . 25 + 200
(7x -11)3 = 1000
(7x-11)3 = 103
7x - 11 = 10
7x = 10+11
7x = 21
x = 21 : 7
x = 3
like nha
a) \(5x+x=39-3^{11}:3^9\)
\(6x=39-3^2\)
\(x=30:6\)
\(x=5\)
vậy \(x=5\)
b) \(7x-x=5^{21}:5^{19}+3.2^2-7^0\)
\(6x=5^2+12-1\)
\(6x=36\)
\(x=6\)
vậy \(x=6\)
câu c tương tự nha
x(7-2)=6^2+4
x5=40
x=8
vậy x=8
7x-x=5^21:5^19+3.2^2-7
x(7-1)=5^2+12-7
x6=30
x=5
vậy x=5
nhớ h cho mình
\(7x-2x=6^{17}:6^{15}+44:11\)
\(5x=6^2+4\)
\(5x=36+4\)
\(5x=40\)
\(x=40:5\)
\(x=8\)
\(7x-x=5^{21}:5^{19}+3.2^2-7\)
\(6x=5^2+3.4-7\)
\(6x=25+12-7\)
\(6x=37-7\)
\(6x=30\)
\(x=30:6\)
\(x=5\)