tìm x:
a) 1170 : (x -13) = 339 - 3 . 102
b) (x100)10 . x999 = x
1170÷(x-13)=339-3×102 ai nhanh minh tick cho
1170-(x-13) = 339 - 3x100
1170 - (x-13) = 339 - 300
1170-(x-13) = 39
x-13 = 1170-39
x-13 = 1131
x = 1131+13 =11 44
1170 : (x - 13) = 339 - 3 . 102
1170 : (x -13) = 339 - 3 . 100
1170 : (x -13) = 339 - 300
1170 : (x - 13) = 39
x - 13 = 1170 : 39
x - 13 = 30
x = 30 + 13
x = 43
vậy x = 43
ủng hô mk nha
\(1170\div\left(x-13\right)=339-3.100\)
\(1170\div\left(x-13\right)=339-300\)
\(1170\div\left(x-13\right)=39\)
\(x-13=1170\div39\)
\(x-13=30\)
\(x=30+13\)
\(x=43\)
\(Vay\)\(x=43\)
Tìm x thuộc N biết
3(x-9)+15=12+243:32
1170:(x-13)=339-3.102
\(3(x-9)+15=12+243:3^2\)
=> 3x - 27 + 15 = 12 + 243 : 9
=> 3x - 27 + 15 = 12 + 27
=> 3x - 27 + 15 = 39
=> 3x - 27 = 39 - 15
=> 3x - 27 = 24
=> 3x = 24 + 27
=> 3x = 51
=> x = 51 : 3 = 17
Vậy x = 17
\(1170:(x-13)=339-3\cdot10^2\)
=> 1170 : [x-13] = 339 - 3 . 100
=> 1170 : [x - 13] = 339 - 300
=> 1170 : [x-13] = 39
=> x - 13 = 30
=> x = 43
a) 3 ( x - 9 ) + 15 = 12 + 243 : 32
3 ( x - 9 ) + 15 = 12 + 27
3 ( x - 9 ) + 15 = 39
3 ( x - 9 ) = 39 - 15
3 ( x - 9 ) = 24
x - 9 = 24 : 3
x - 9 = 8
x = 8 + 9
x = 17
Vậy x = 17
b) 1170 : ( x - 13 ) = 339 - 3 . 102
1170 : ( x - 13 ) = 339 - 300
1170 : ( x - 13 ) = 39
x - 13 = 1170 : 39
x - 13 = 30
x = 30 + 13
x = 43
Vậy x = 43
=))
3.(x-9)+15=12+243:\(3^2\)
3.(x-9)+15=12+243:9
3.(x-9)+15=12+27
3.(x-9)+15=39
3.(x-9)=24
x-9=24:3
x-9=8
x=17
Vậy x=17
1170:(x-13)=339-3.\(10^2\)
1170:(x-13)=339-3.100
1170:(x-13)=339-300
1170:(x-13)=39
x-13=1170:39
x-13=30
x=30+13=43
Vậy x=43
1170:(x-13)=339-3*100 ai giúp e vs
1170 : ( x - 13 ) = 339 - 3 * 100
1170 : ( x - 13 ) = 39
x - 13 = 1170 : 39
x - 13 = 30
x = 30 + 13
x = 43 .
Tìm số tự nhiên x biết :
a) 5x - 2x = 2^5 + 1^9
b) x^200 = x
c) 1170 : ( x - 13 ) = 339 - 3 \(\times\) 10^2
d) 4x + 3x = 30 - 20 \(\div\) 10 .
a, 13 x 100 + 2 x 100 -9 x100 b, 10 - 8 + 9 - 7 + 6 - 4 + 5 - 3 +2 - 0
`a,`
`13 \times 100 + 2 \times 100 - 9 \times 100`
`= 100 \times (13+2-9)`
`= 100 \times 6`
`= 600`
`b,`
`10 - 8 + 9 - 7 + 6 - 4 + 5 - 3 +2 - 0`
`= (10-8)+(9-7)+(6-4)+(5-3)+2`
`= 2+2+2+2+2`
`= 10`
Bài 7: Tính:
a,3^5 - 10^2 ÷ 5^2+ 2^3.7
b, 2200÷ { 320÷[ 88- (72- 16.4]}
c, 2^4.5- { 140-[ 868- 12( 3087÷ 7^2+ 4^0)]}
d, 125÷{100-[225.2÷(3^3-3^2)].3}
Bài 8: Tìm x, biết
a, 1045÷[ 215-(3x -24)]= 5
b, 1170÷(x -13)=339-3.10^2
c, 3.(x-9)+ 15 = 12 + 243÷ 3^2
d, 2640+[(900-3x)÷ 45].24= 3000
Các bạn giúp mình giải bài toán này vs. Tối mình phải nộp lại bài cho cô rồi!
Tìm số tự nhiên x, biết:
a, 1170 : x - 13 = 339 . 3 . 10 2
b, 3 x - 9 + 15 = 12 + 243 : 3 2
a, 1170 : x - 13 = 339 . 3 . 10 2
1170:(x - 13) = 339 - 3.100
1170:(x - 13) = 39
x - 13 = 1170:39 = 30
x = 30+13 = 43
b, 3 x - 9 + 15 = 12 + 243 : 3 2
3(x - 9) + 15 = 12+243:9
3(x - 9)+15 = 12+27
3(x - 9)+15 = 39
3(x - 9) = 24
x - 9 = 8
x = 17
3. Tìm x:a
)2+x=13/2.
b)x:3/4=4/5 x=......
Giúp mik vs nha mik cần gấp ạ 🥺🥺🥺
\(a,x=\dfrac{13}{2}-2\\ x=\dfrac{9}{2}\\ b,x=\dfrac{4}{5}\times\dfrac{3}{4}\\ x=\dfrac{12}{20}=\dfrac{3}{5}\)
tìm x:a.1+(1+2x)+(1+3x)+...+(1+19x)=417
b.10+(11+x)+(12+2x)+(13+3x)+...+(19+9x)=190