10 - {[( x : 3 + 17) : 10 + 3 . \(2^4\)] : 10 } = 5
Bài 3:Tìm các số nguyên x,biết:
a)(2 x - 5)+17=6
b)10 - 2( 4 - 3 x ) = - 4
c)10 - 2( 4 - 3 x ) = - 4
d)5 - 2 x = - 17 + 12
\(a,2x-5+17=6\\ \Rightarrow2x=-6\\ \Rightarrow x=-3\\ b,\Leftrightarrow10-8+6x=-4\\ \Leftrightarrow6x=-6\Leftrightarrow x=-1\\ d,\Rightarrow-2x=-10\\ \Rightarrow x=5\)
câu c giống câu b nhó
10 - ((( x : 3 + 17 ) : 10 + 3 . 2 mũ 4 ) : 10 ) = 5
a, 10 - {[ 3 mũ x +1 : (3 + 17) : 10 +3 . 2 mũ 4 ] : 10 } = 5
\(10-\left\{\left[3^x+1:\left(3+17\right):10+3\cdot2^4\right]:10\right\}=5\)
\(\Rightarrow\left(3^x+1:20:10+3\cdot16\right):10=10-5\)
\(\Rightarrow\left(3^x+\dfrac{1}{200}+48\right):10=5\)
\(\Rightarrow3^x+\dfrac{9601}{200}=5\cdot10\)
\(\Rightarrow3^x+\dfrac{9601}{200}=50\)
\(\Rightarrow3^x=50-\dfrac{9601}{200}\)
\(\Rightarrow3^x=\dfrac{399}{200}\)
Xem lại đề
Tìm x,biết:
a,3 / (x+2).(x+5) + 5 / (x+5).(x+10) + 7 / (x+10) . (x+17)= x / (x+2).(x+17)
x∉{-2 ; -5 ;-10 ; -17}
b,2 / (x-1). (x-3)+5 / (x-3).(x-8)+12 / (x-8).(x-20)-1 / x-20=-3/4
x∉{1;3;8;20}
c,x-1/2009 + x-2/2008 = x-3/2007 + x-4 / 2006
720 : ( x . 2 + x . 3 ) = 3.2
720 : ( x . 2 + x.3 ) = 6
( x .2 + x.3 ) = 720 : 6
x.2+x.3 = 120
x . ( 2 + 3 ) = 120
x . 5 = 120
x = 120 : 5
x = 24
10 - {[( x : 3 + 17) : 10 + 3 . \(2^4\)] : 10 } = 5
\(\Leftrightarrow\left\{\left[\left(x:3+17\right):10+48\right]:10\right\}=5\)
=>(x:3+17):10+48=50
=>(x:3+17):10=2
=>x:3+17=20
=>x:3=3
hay x=9
10 - {[( x : 3 + 17) : 10 + 3 . \(2^4\)] : 10 } = 5
\(10-\left\{\left[\left(x:3+17\right):10+3.2^4\right]:10\right\}=5\)
\(\Leftrightarrow\left[\left(x:3+17\right):10+3.2^4\right]:10=5\)
\(\Leftrightarrow\left(x:3+17\right):10+3.16=50\)
\(\Leftrightarrow\left(x:3+17\right):10+48=50\)
\(\Leftrightarrow\left(x:3+17\right):10=2\)
\(\Leftrightarrow x:3+17=20\Leftrightarrow x:3=3\)
\(\Leftrightarrow x=9\)
mk làm gọn bn làm chi tiết hơn nha
a) (4.x+5):3-121:11=4
b)2x+2x+3=144
c)10{[(x:3+17):10+3.22]:10}=5
c) 10 . {[(x : 3 + 17) : 10 + 3 . 2^2] : 10} = 5
[(x : 3 + 17) : 10 + 3 . 4] : 10 = 5 : 10
[(x : 3 + 17) : 10 + 12] : 10 = 1/2
(x : 3 + 17) : 10 + 12 = 1/2 . 10
(x : 3 + 17) : 10 + 12 = 5
(x : 3 + 17) : 10 = 5 - 12
(x : 3 + 17) : 10 = -7
=> x : 3 + 17 = -7 . 10
x : 3 + 17 = -70
x : 3 = -70 - 17
x : 3 = -87
x = -87 . 3
x = -261
a ) \(\left(4x+5\right):3-121:1=4\)
\(\Leftrightarrow\left(4x+5\right):3-11=4\)
\(\Leftrightarrow\left(4x+5\right):3=15\)
\(\Leftrightarrow\left(4x+5\right)=45\)
\(\Leftrightarrow4x=40\)
\(\Leftrightarrow x=10\)
Tiếp tịch như z là đc
a, (4.x+5)/3-121/11=4
(4.x+5)/3-11=4
(4.x+5)/3=4+11
(4.x+5)/3=15
4.x+5=15/3
4.x+5=5-----4.x=5-5----4.x=0---x=0/4---x=0
b,2^x+n^x+3=144
2^x+2^x.2^3=144
2^x.(1+2^3)=144
2^x.(1+8)=144
2^x.9=144---2^x=144/9------2^x=16=2^4---x=4
câu c tự làm dài quá tớ ko làm kịp tu la nha
Tìm số tự nhiên x , biết rằng ; 10-{[(x:3+17):10+3×2^4]:10=5
bạn cứ làm từng bước 1 là nó sẽ ra
chú ý phá ngoặc
10-{[x:3+17):10+3.2^4]:10=5
[(x:3+17):10+3.16]:10=10-5
[(x:3+17):10+48]:10=5
(x:3+17):10+48=5.10
(x:3+17):10+48=50
(x:3+17):10=50-48
(x:3+17):10=2
x:3+17=2.10
x:3+17=20
x:3=20-17
x:3=3
x=3;3
x=1
1, (2+4+6+...+100)
2, 10-(3-x)=-10+17
3, 17-(3+x)=2-(7-8)
4, (5+x)-(15-31)=-20
5, 17-(3+x)+15-3=2
6, (41-x)-(13-17)=40-50
7, -(52-x)+(40-42)=-57+13