Bài 1 : Tìm x biết , 2448 : [ 119 - (x - 6) ] . 28 = 5628
1) [(x+32)-17].2=42
2) 44=7.x=103:10
3) 128-3(x+4)=23
4) (6x-33).53=3.54
5) [(6x-72):2-84].28=5628
6) 2448:[119-(x-6)]=24
Bài 2 tìm X biết:
a) 2448 : ( 119 - ( X - 6 ) = 24
b) ( X + 1) + ( X+ 3 ) + (X + 5 ) + ...+( X+99) = 2550
Giải hộ mik với
Câu b,
= 50x + (1 + 3 + 5 + ..... + 99) = 2550
= 50x + 2500 = 2550
= 50x = 2550 - 2500
= 50x = 50
= x = 50 : 50
= x = 1
refer
A) 2448:[119-[x-6]]=24
<=> 199 - ( x-6 ) = 2448 : 24 = 102
<=> x - 6 = 199 - 102 = 97
<=> x = 97 +6 = 103
B) (x+1)+(x+3)+(x+5)+......+(x+99) = 2550
(x+x+x+....+x)+(1+3+5+....+99) = 2550
50x + 2500 = 2550
50x = 2550 - 2500
50x = 50
x = 50 : 50
x = 1
Bài 1 : Tìm x . b , 2448 : [ 119 - (x - 6) ] = 24
tìm x biết 2448:[119-[x-6]]=24
2448:[119-[x-6]]=24
<=> 199 - ( x-6 ) = 2448 : 24 = 102
<=> x - 6 = 199 - 102 = 97
<=> x = 97 +6 = 103
2448:[119-(x-6)]=24
119-(x-6)= 2448 : 24
119-(x-6)= 102
x-6= 119-102
x-6= 17
x=17+6
x=23
2448:[119-[x-6]]=24
[119-(x-6)]=2448:24
[119-(x-6)=102
x-6=119-102
x-6=17
x=17+6
x=23
tìm x biết 2448:[119-(x-6)=24
119 - (x - 6) = 2448 : 24=102
x-6= 119 - 102=17
x = 17 + 6=23
119 - ( x - 6 ) = 2448 : 24 = 102
x - 6 = 119 - 102 = 17
x = 17 + 6 = 23
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
\(1,17-2\left(2x-3\right)=3\)
\(\Rightarrow17-4x+6=3\)
\(\Rightarrow4x=20\Leftrightarrow x=5\)
\(2,125-5\left(3x-1\right)=25\)
\(\Rightarrow125-15x-5=25\)
\(\Rightarrow15x=95\Rightarrow x=3,8\)
\(3,70-5\left(2x-3\right)=45\)
\(\Rightarrow70-10x+15=45\)
\(\Rightarrow10x=45\Leftrightarrow x=4,5\)
\(4,231-\left(x-6\right)=\frac{133}{13}\)
\(\Rightarrow231-\frac{133}{13}=x-6\)
\(\Rightarrow x=237-\frac{133}{13}=\frac{2821}{13}\)
Tìm x:
2448: [119- ( x-6) ] =24
2448 : [ 119 - ( x - 6 ) ] = 24
119 - ( x - 6 ) = 102
x - 6 = 17
x = 23
\(2448:\left[119-\left(x-6\right)\right]=24\)
\(119-\left(x-6\right)=2448:24\)
\(119-x+6=102\)
\(125-x=102\)
\(x=125-102\)
\(x=23\)
\(2448:\left[119-\left(x-6\right)\right]=24\)
\(\Rightarrow119-\left(x-6\right)=2448:24\)
\(\Rightarrow119-\left(x-6\right)=102\)
\(\Rightarrow x-6=119-102\)
\(\Rightarrow x-6=17\)
\(\Rightarrow x=17+6\)
\(\Rightarrow x=23\)
Học tốt #
Tìm x biết :
1, 1+2+...+x=35 2, 12x+13x=2000
3, 2+4+...+2x=110 4, 6x+4x=2010
5, 8x-4x=1208 6, [(6x-39):3]*28=5628
7, 2448:[119-(x-6)]=24
Tìm X , biết :
[ ( 6 * X - 72 ) ] * 28 = 5628
[ ( 6 * X - 72 ) ] * 28 = 5628
[ ( 6 * X - 72 ) ] = 5628 : 28
[ ( 6 * X - 72 ) ] = 201
6 * X - 72 = 201
6 * X = 201 + 72
6 * X = 273
X = 273 : 6
X = 45,5
[ ( 6 * X - 72 ) ] * 28 = 5628
( 6 * X - 72 ) = 5628:28
( 6 * X - 72 ) =201
6 * X =201+72
6 * X =273
X =273:6
X =45,5