Tìm x :
10 + 2 x X = 16 x 4 : 4
231 - ( X - 6 ) = 1339 : 13
2*X-138=8*9
231-(X-6)=1339:13
70-5*(X-3)=45
10+2*X=16
a) 2 * x - 138 = 8 * 9
2 * x - 138 = 72
2 * x = 210
x = 105
b) 231 - ( x - 6 ) = 1339 : 13
231 - x + 6 = 103
237 - x = 103
x = 134
c) 70 - 5 * ( x-3) = 45
5 * (x-3) = 25
x - 3 = 5
x = 8
cac phan con lai bn lm tuong tu nha
* 2*X-138=8*9
<=> 2*X-138=72
<=> 2*X=72+138
<=> 2*X=210
<=> X=210/2=105
*231-(X-6)=1339:13
<=> 231-(X-6)=103
<=> X-6=231-103
<=>X-6=128
<=>X=128+6=134
*70-5*(X-3)=45
<=>5*(X-3)=70-45
<=>5*(X-3)=25
<=>X-3=25/5
<=>X-3=5
<=>X=8
*10+2*X=16
<=>2*X=16-10
<=>2*X=6
<=>X=6/2=3
\(2x-138=72\)
\(2x=72+138\)
\(2x=210\)
\(x=105\)
\(231-\left(x-6\right)=1339:13\)\(231-\left(x-6\right)=103\)
\(x-6=231-103\)
\(x-6=128\)
\(x=134\)
\(70-5\left(x-3\right)=45\)\(5\left(x-3\right)=70-45\)
\(5\left(x-3\right)=25\)
\(x-3=5\)
\(x=5+3\)
\(x=8\)
\(10+2x=16\)\(2x=16-10\)
\(2x=6\)
\(x=3\)
Tìm số tự nhiên x, biết :
a. 10 + 2.x = 45 : 43 b. 2.x - 138 = 23.32 c. 231 - ( x - 6 ) = 1339 : 13
a: =>2x+10=4^2=16
=>2x=6
=>x=3
b: =>2x-138=8*9=72
=>2x=138+72=210
=>x=105
c: =>231-(x-6)=103
=>x-6=128
=>x=134
\(a.10+2x=4^5:4^3\\ \Leftrightarrow10+2x=4^2\\ \Leftrightarrow2x=6\\ \Leftrightarrow x=3\)
\(b.2x-138=2^3.3^2\\ \Leftrightarrow2x-138=72\\ \Leftrightarrow x=210:2\\ \Leftrightarrow x=105\)
\(c.231-\left(x-6\right)=1339:13\\ \Leftrightarrow231-\left(x-6\right)=103\\ \Leftrightarrow x-6=128\\ \Leftrightarrow x=134\)
Chú ý : Nếu bạn chưa học \(\Leftrightarrow\) thì bạn bỏ đi nha !
Tìm số tự nhiên x biết :
a) 10 + 2 . x = 45 : 43
b) 2 . x - 138 = 23 . 32
c) 231 - (x -6) = 1339 : 13
d) x + 5 . 2 - (32 +16 . 3 : 6 - 15) =0
Ai giải nhanh mà giải đúng cách và chi tiết mik tick cho nha !
a, 10 + 2x = 45 ÷ 43
10 + 2x = 45/43
2x = 45/43 - 10
2x = -385/43
x = -385/43 ÷ 2
x = -385/86
b, 2x - 138 = 23.32
2x - 138 = 736
2x = 736 + 138
2x = 874
x = 874 ÷ 2
x = 437
c, 231 - ( x - 6 ) = 1339 ÷ 13
231 - ( x - 6 ) = 103
x - 6 = 231 - 103
x - 6 = 128
x = 128 + 6
x = 134
d, x + 5.2 - ( 32 + 16.3 ÷ 6 - 15 ) = 0
x + 10 - 25 = 0
x + 10 = 0 + 25
x + 10 = 25
x = 25 - 10
x = 15
a) 10 + 2 . x = 45 : 43
2 . x = 45/43 -10
2 . x = -385/43
x = -385/43 : 2
x = -385/86
b) 2 . x - 138 = 23 . 32
2 . x - 138 = 736
2 . x = 736+138
2 . x = 874
x = 874 : 2
x = 437
c) 231 - (x -6) = 1339 : 13
231 - (x -6) = 103
x - 6 = 231 -103
x - 6 = 98
x = 98 +6
x = 104
d) x + 5 . 2 - (32 +16 . 3 : 6 - 15) = 0
x + 5 . 2 - (32 + 48 : 6 - 15) = 0
x + 5 . 2 - (32 + 8 - 15) = 0
x + 5 . 2 - 25 = 0
x + 10 - 25 = 0
x + 10 = 0 + 25
x + 10 = 25
x = 25 - 10
x = 15
Bài 10: Tìm số tự nhiên x, biết:
a) 70 – 5 . (x – 3) = 45 b) 2 . x – 138 = 2 ^3 . 3^ 2 c) 10 + 2 . x = 4 ^5 : 4 ^3d) 231-( x-6) = 1339: 13a,70 – 5.(x – 3) = 45
5.(x -3) = 70 - 45
5.(x – 3) = 25
x – 3 = 25 : 5
x – 3 = 5
x = 5 + 3
x = 8
Vậy x = 8
b,\(2x-138=8x9=72\)
\(2x=138+72=210\)
\(x=210:2=105\)
c,\(10+2x=4^2\)\(=16\)
\(2x=16-10=6\)
\(x=6:2=3\)
d, 231 – (x- 6) = 1339 : 13
231 – (x – 6) = 103
x – 6 = 231 – 103
x – 6 = 128
x = 128 + 6
x = 134
Vậy x = 134
Tìm x
1+40÷x=21
2×x-138=2^3×3^2
10+2×x=4^5÷4^3
10×x-20=10^2
42=39×42-37×42
(X-5)-100=0
231-(x-6)=1339÷13
8 (x-3)=0
1+40/x=21
40/x=21-1
40/x=20
x=40/20
x=2
Tìm x :
a) 13 - 2 ( x + 1 ) = 7
b) 6x + 2 . 4 = 5^2 . 2
c) 420 + 65 . 4 = ( x + 175 ) : 5 + 30
d) 32 . 12 : 2 = ( x + 70 ) : 14 - 40
e) 231 - ( x - 6 ) = 1339 : 13
f) 10 + 2x = 4^5 : 4
g) 70 - 5 ( x - 3 ) = 45
a)13-2(x+1)=7
2.(x+1)=13-7
2.(x+1)=6
x+1=6/2
x+1=3
x=3-1
x=2
a, 13 - 2 ( x + 1 ) = 7
2 .( x + 1 ) = 13 - 7
2 .( x + 1 ) = 6
x + 1 = 6 : 2
x + 1 = 3
x = 3 - 1
x = 4
b)6x+2.4=52.2
6x+2=50
6x=48
x=8
c)420+65.4=(x+175):5+30
(x+175):5+30=680
(x+175):5=650
x+175=3250
x=3075
Tìm X
a) 0,12 x X - 2 = 4
b) 231 - ( X - 6 ) = 1339 : 13
c) 7,99 x X + X x 2 + X : 100 = 7,9
d) ( 14 - X : 6 ) x 7 = 84
a)0,12.X-2=4
=>0,12.X=4+2
=>0,12.X=6
=>X=6:0,12
=>X=50
b)231-(X-6)=1339:13
=>231-(X-6)=103
=>X-6=231-103
=>X-6=128
=>X=128+6
=>X=134
c)7,99.X+X.2+X:100=7,9
=>X.(7,99+2+1/100)=7,9
=>X.10=7,9
=>X=7,9:10
=>X=0,79
d)(14-X:6).7=84
=>14-X:6=84:7
=>14-X:6=12
=>X:6=14-12
=>X:6=2
=>X=2.6
=>X=12
a) 10+2.x=4 mũ 5 4 mũ 3
b)2.x-138= 2 mũ 3. 3 mũ 2
c)231-(x-6)=1339:13
Tìm số tự nhiên x biết :
a) 231 - (x - 6) = 1339 : 13
b) x + 5 .2 - (32 + 16 . 3 : 6 - 15) = 0
Ai giải đúng và nhanh mik tick cho nha !
a)231-(x-6)=103
x-6=231-103=128
x=128+6=134
b)x+10-25=0
x+10=0+25=25
x=25-10=15