5(x+35)=315
tính giá trị biểu thức
35+37+39+41+...+105
5-10+15-20+25-30+35+...+305-310+315
tìm x
D= 5+( 15-10)+(25-20)+...+(315-310)
giúp mình nha mai mình nộp mình tick cho
Tìm x, biết:
a) 4 x + 18 : 2 = 13
b) 2 x - 2 0 = 3 5 : 3 3
c) 48 - 3 ( x + 5 ) = 24
d) ( 15 + x ) : 3 = 3 15 : 3 12
Tìm x, biết:
a, 4x+18:2 = 13
b, 48 – 3(x+5) = 24
c, 2 x - 2 0 = 3 5 : 3 3
d, (15+x):3 = 3 15 : 3 12
a, 4x+18:2 = 13
4x+9 = 13
x = 1
b, 48 – 3(x+5) = 24
3(x+5) = 24
x + 5 = 8
x = 3
c, 2 x - 2 0 = 3 5 : 3 3
2x – 1 = 3 2
2x = 10
x = 5
d, (15+x):3 = 3 15 : 3 12
(15+x):3 = 3 3
(15+x):3 = 27
15 + x = 54
x = 39
Tim x
x/13=35/91
9+x/13-x=5/6
x+x:5*7,5+x:2*9=315
2/3*x+1/2=9/10-1/5
Tìm x biết:
X*99+x=100
420+65*x=(x+175):5+30
x:[(1800+600):30]=5600:(315-35)
a)\(x.99+x=100\)
\(\Rightarrow x.\left(99+1\right)=100\)
\(\Rightarrow x.100=100\)
\(\Rightarrow x=1\)
b)\(420+65.x=\left(x+175\right):5+30\)
\(420+65.x=\left(x+175\right).\dfrac{1}{5}+30\)
\(420+65.x=\dfrac{1}{5}x+35+30=\dfrac{1}{5}x+65\)
\(\Rightarrow420-65=\dfrac{1}{5}x-65x\)
\(\Rightarrow-64,8x=355\)
\(\Rightarrow x=-\dfrac{1775}{324}\)
c)\(x:\left[\left(1800+600\right):30\right]=5600:\left(315-35\right)\)
\(x:80=20\Rightarrow x=20.80=1600\)
TÌM X
140 : ( X - 8 ) = 7
4( X + 41 ) = 400
135 - 5(X + 4 ) = 35
25 + 3(X - 8 ) = 106
X : [ (1800 + 600 ) : 30 ] = 560 : ( 315 - 35 )
[ ( 250 - 25 ) : 15 ] : X = ( 450 - 60 ) : 130
140 : ( x - 8 ) = 7
x - 8 = 140 : 7 = 20
x = 20 + 8
x = 28
* 140 : (X-8)=7
X-8=140:7
X-8=20
x=20+8
x=28
Vậy X =28
* 4(X+41)=400
X+41=400:4
X+41=100
X=100-41
X=59
Vậy x=59
*135-5(X+4)135
5(X+4)=135-35
5(X+4)=100
X+4=100:5
X+4=20
X=20-4
X=16
Vậy X = 16
A,x : [(1800+600):30] = 560 : (315 - 35)
B, [(250-25): 15]:x= (450-60) : 130
bạn nào làm đúng mk cho 5 like!!!
x : [ ( 1800 + 600 ) ; 30 ] = 560 : ( 315 - 35 )
x : [ 2400 : 30 ] = 560 : 280
x : 80 = 2
x = 2 x 80
x = 160
b , [( 250 - 25 ) : 15 ] : x = ( 450 - 60 ) : 130
[225 ; 15 ] : x = 390 : 130
15 : x = 3
x = 15 : 3
x = 5
tick nha !!!!!!!!!!!!!
A, x:[(1800+600):30] = 560:(315-35)
x:[2400:30] = 560 : 280
x : 80 = 2
x = 160
B, [(250-25):15]:x = (450-60):130
[225:15]:x = 390 : 130
15 : x = 3
=> x = 5
Đúng nha!!!!!
x:[(1800+600):30]=560:(315-35)
x=
x : [ ( 1800 + 600 ) : 30] = 560 : ( 315 - 35 )
\(x:\left[\left(1800+600\right):30\right]=560:\left(315-35\right)\)
\(x:\left[2400:30\right]=560:280\)
\(x:80=2\)
\(x=2\times80\)
\(x=160\)
\(X:80=560:280\)
\(X:80=2\)
\(X=80.2=160\)
\(x:\left[\left(1800+600\right):30\right]=560:\left(315-35\right)\)
\(\Rightarrow x:\left[2400:30\right]=560:280\)
\(\Rightarrow x:80=2\)
\(\Rightarrow x=2\times80\)
\(\Rightarrow x=160\)
Vậy x = 160
_Chúc bạn học tốt_