15x–133=17
15x–133=17
\(15x-133=17\\ 15x=133+17\\ 15x=150\\ x=150:15\\ x=10\)
\(15x-133=17\)
\(\Rightarrow15x=17+133\)
\(\Rightarrow15x=150\)
\(\Rightarrow x=10\)
\(15x-133=17\)
\(15x=17+133\)
\(15x=150\)
\(x=150:15\)
\(x=10\)
Bài 2.Tìm x
a,10+2x=4^5:4^3
b,14x+54=82
c,15x-133=17
a) \(10+2x=4^5:4^3\)
\(\Leftrightarrow10+2x=4^2\)
\(\Leftrightarrow2x=6\)
\(\Leftrightarrow x=3\)
b) \(14x+54=82\)
\(\Leftrightarrow14x=28\)
\(\Leftrightarrow x=2\)
c) \(15x-133=17\)
\(\Leftrightarrow15x=150\)
\(\Leftrightarrow x=10\)
a) 10 + 2x = 4^5 : 4^3
=> 10 + 2x = 4^2
=> 2x = 6
=> x = 3
b) 14x + 54 = 82
=> 14x = 28
=> x = 2
c) 15x - 133 = 17
=> 15x = 150
=> x = 10
Mỗi câu bạn tính xong x bạn thêm chữ vậy x =... vào nha
\(a,10+2x=4^5:4^3\)
\(\Rightarrow10+2x=4^2\)
\(\Rightarrow10+2x=16\)
\(\Rightarrow2x=16-10\)
\(\Rightarrow2x=6\)
\(\Rightarrow x=6:2\)
\(\Rightarrow x=3\)
\(b,14x+54=82\)
\(\Rightarrow14x=82-54\)
\(\Rightarrow14x=28\)
\(\Rightarrow x=28:14\)
\(\Rightarrow x=2\)
\(c,15x-133=17\)
\(\Rightarrow15x=133+17\)
\(\Rightarrow15x=150\)
\(\Rightarrow x=150:15\)
\(\Rightarrow x=10\)
7 [ x + 5 ] - 20 = 190 155 - 10 [ x + 1 ]= 55
6 [ x + 2 mũ 3 ] + 40 = 100 15x - 133 = 17
90 [ x + 2 ] = 45 14x + 54= 82
17x - 20 =14
A, 7[x + 5] - 20 = 190
7x + 35 - 20 = 190
7x + 15 = 190
7x = 175
x = 25
B, 155 - 10[x + 1] = 55
155 - 10x - 10 = 55
-10x + 90 = 55
-10x = -35
x = 3.5
C, 6[x + 2^3] + 40 = 100
6[x + 8] + 40 = 100
6x + 48 + 40 = 100
6x + 88 = 100
6x = 1
2 x = 2
D, 15x - 133 = 17
15x = 150
x = 10
E, 90[x + 2] = 45
90x + 180 = 45
90x = -135
x = -1.5
F, 4x + 54 = 82
4x = 28
x = 7
G, 17x - 20 = 14
17x = 34
x = 2
95-5(x+2)=45
14x + 54 =82
15x-133=17
155-10(x+1)=55
các bạn làm đủ hộ nha
a. 95 - 5.(x + 2) = 45
5.(x + 2) = 95 - 45
x + 2 = 50 : 5
x = 10 - 2
x = 8
b. 14x + 54 = 82
14x = 82 - 54
x = 28 : 14
x = 2
c. 15x - 133 = 17
15x = 17 + 133
x = 150 : 15
x = 10
d. 155 - 10.(x + 1) = 55
10.(x + 1) = 155 - 55
x + 1 = 100 : 10
x = 10 - 1
x = 9
\(95-5\left(x+2\right)=45\) \(14x+54=82\)
\(5\left(x+2\right)=95-45\) \(14x=82-54\)
\(5\left(x+2\right)=50\) \(14x=28\)
\(x+2=50:5\) \(x=28:12\)
\(x+2=10\) \(x=2\)
\(x=10-2\)
\(x=8\) \(155-10\left(x+1\right)=55\)
\(10\left(x+1\right)=155-55\)
\(15x-133=17\) \(10\left(x+1\right)=100\)
\(15x=133+17\) \(x+1=100:10\)
\(15x=150\) \(x+1=10\)
\(x=150:15\) \(x=10-1\)
\(x=10\) \(x=9\)
Tìm STN x biết.
70 - 5. (X-3) = 45
12+ (5+x) = 20
130-( 100+x) = 25
175 + (30 - x) = 200
5(x + 12) + 22 = 92
95-5(x+2) = 45
14x +54 = 82
15x -133 = 17
155-10(x + 1) = 55
1) 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
2) 12 + ( 5 + x ) = 20
5 + x = 20 - 12
5 + x = 8
x = 8 - 5
x = 3
3) 130 - ( 100 + x ) = 25
100 + x = 130 - 25
100 + x = 105
x = 105 - 100
x = 5
4) 175 + ( 30 - x ) = 200
30 - x = 200 - 175
30 - x = 25
x = 30 - 25
x = 5
5) 5( x + 12 ) + 22 = 92
5( x + 12 ) = 92 - 22
5( x + 12 ) = 70
x + 12 = 70 : 5
x + 12 = 14
x = 14 - 12
x = 2
6) 95 - 5( x + 2 ) = 45
5( x + 2 ) = 95 - 45
5( x + 2 ) = 50
x + 2 = 50 : 5
x + 2 = 10
x = 10 - 2
x = 8
7) 14x + 54 = 82
14x = 82 - 54
14x = 28
x = 28 : 14
x = 2
8) 15x - 133 = 17
15x = 17 + 133
15x = 150
x = 150 : 15
x = 10
9) 155 - 10( x + 1 ) = 55
10( x + 1 ) = 155 - 55
10( x + 1 ) = 100
x + 1 = 100 : 10
x + 1 = 10
x = 10 - 1
x = 9
1)17-2 (2x-3)=3 2)125-5 (3x-1)=25
3)70-5(2x-3)=45 4)231-(x-6)=133:13
5)2448 : [119- (x-6)]=24 6)15x-13x=882
7)[ (6x-72):2-84].28=5628 8)100-4(30-5x)=20
Trả lời
1)17-2(2x-3)=3
2(2x-3)=17-3
2(2x-3)=14
2x-3 =14:2
2x-3 =7
2x =7+3
2x =10
x =10:2
x =5
1) 17 - 2(2x - 3) = 3
=> 17 - 4x + 6 = 3
=> 23 - 4x = 3
=> 4x = 23 - 3
=> 4x = 20
=> x = 20 : 4 = 5
2) 125 - 5(3x - 1) = 25
=> 125 - 15x + 5 = 25
=> 130 - 15x = 25
=> 15x = 130 - 25
=> 15x = 105
=> x = 105 : 15
=> x = 7
3) 70 - 5(2x - 3) = 45
=> 70 - 10x + 15 = 45
=> 85 - 10x = 45
=> 10x = 85 - 45
=> 10x = 40
=> x = 40 : 10
=> x = 4
4) 231 - (x - 6) = 133 : 13
=> 231 - x + 6 = 133/13
=> 237 - x = 133/13
=> x = 237 - 133/13
=> x = 2948/13
\(1,17-2\left(2x-3\right)=3\)
\(\Rightarrow17-4x+6=3\)
\(\Rightarrow4x=20\Leftrightarrow x=5\)
\(2,125-5\left(3x-1\right)=25\)
\(\Rightarrow125-15x-5=25\)
\(\Rightarrow15x=95\Rightarrow x=3,8\)
\(3,70-5\left(2x-3\right)=45\)
\(\Rightarrow70-10x+15=45\)
\(\Rightarrow10x=45\Leftrightarrow x=4,5\)
\(4,231-\left(x-6\right)=\frac{133}{13}\)
\(\Rightarrow231-\frac{133}{13}=x-6\)
\(\Rightarrow x=237-\frac{133}{13}=\frac{2821}{13}\)
697/15x+346/x=17
17+15x(7x7)7+7=?
(15x+364):x=697:17(x khác 0)
15x+364= 41x
41x - 15x = 364
26x = 364
X= 364 : 26
X = 14
Tk cho mình nha yêu nhiều! Chúc bạn học tốt!
( 15x + 364 ) : x = 697 : 17
<=> ( 15x + 364 ) : x = 41
<=> 15x + 364 = 41x
<=> 364 = 26x
<=> x = 364 : 26
<=> x = 14
Vậy x = 14
~ Hok tốt ~