Tìm x:
(x+5)+(x+10)+(x+15)+...+(x+100)=1150
Tìm x:
a : ( x + 3)+(x + 7)+(x + 11)+(x +15)+......+(x + 41) = 580
b: ( x + 5)+(x + 7)+(x + 15)+(x + 20)+.......+(x + 100) = 1150
( x+5 ) + ( x+10) + ( x+15) + ........ + ( x+ 100) = 1110. Tìm x
( x + 5 ) + ( x + 10 ) + ...+ ( x + 100 ) = 1110
=> ( x+x+x+...+x) + ( 5+10+15+...+100) = 1110
=> x . 20 + 1050
=> x . 20 = 60
=> x = 3
vậy x = 3
( x + 5 ) + ( x + 10 ) + ( x + 15 ) + ........ + ( x + 100 ) = 1110. Tìm x
=> ( x + x + x + ... + x ) + ( 5 + 10 + 15 + ... + 100 ) = 1110
=> X x 20 + 1050
=> X x 20 = 60
=> X = 3
Vậy x bằng : 3
(x+5)+(X+10)+(x+15)+....+(x+100)=1110
20x+(5+10+15+...+100)=1110
20x+1050=1110
20x=1110-1050
20x=60
x=60:20
x=3
tìm x biết : (x+5) + (x+10) + (x+15) +...+ (+100)= 1110
( x + 5 ) + ( x + 10 ) + ( x + 15 ) + ...... + ( x + 100 ) = 1110
20x + ( 5 + 10 + 15 + ..... + 100 ) = 1110
20x + ( 105 x 10 ) = 1110
20x + 1050 = 1110
20x = 1110 - 1050
20x = 60
x = 60 : 20
x = 3
Vậy x = 3
Tra loi:
(x+5)+(x+10)+x+15+.....+(x+100)=1110
=>( x+x+.....+x) + (5+10+...+100)=1110
=> 20x +1050=1110
=> 20x=60
=> x=3
1.Tìm x,biết:
(x + 5) + (x +10) + (x +15) + ... + (x +100) = 1110
( x + 5 ) + ( x + 10 ) + . . . + ( x + 100 ) = 1110
=> x × 20 + ( 5 + 10 + . . . + 100 ) = 1110
=> x × 20 + 1050 = 1110
=> x × 20 = 60
=> x = 60 : 20
=> x = 3
Số số hạng của dãy là:(100-5):5+1=20
(x+x+...+x)+(5+10+15+...+100)=1110
x × 20+(100+5)×20:2=1110
x×20+1050=1110
x×20=1110-1050
x×20=60
x=60:20
x=3
( x + 5 ) + ( x + 10 ) + ( x + 15 ) + ... + ( x + 100 ) = 1110
Trả lời : Tìm x = ?
( x + 5 ) + ( x + 10 ) + ...+ ( x + 100 ) = 1110
=> ( x+x+x+...+x) + ( 5+10+15+...+100) = 1110
=> x . 20 + 1050
=> x . 20 = 60
=> x = 3
vậy x = 3
<=>(x+x+x+...+x)+(5+10+...+100)=1110
=>20x+1050=1110
=>20x=1110-1050
=>20x=60
=>x=3
( x + 5 ) + ( x + 10 ) + ...+ ( x + 100 ) = 1110
=> ( x+x+x+...+x) + ( 5+10+15+...+100) = 1110
=> x . 20 + 1050
=> x . 20 = 60
=> x = 3
vậy x = 3
tính nhanh:
10 x 5 + 5 + 10 + 10 + 5
tìm x :
100 + x = 15 + 15
tính nhanh tính đúng tchs mình tchs lại
tính nhanh :
10 x 5 + 5 + 10 + 10 + 5
= 50 + (5 + 5) + (10 + 10)
= 50 + 10 + 20
= 80
tìm x :
100 + x = 15 + 15
100 + x = 30
x = 100 - 30
x = 70
tchs mình tchs lại nhớ làm đúng
tính nhanh : = 80
tìm x= 70 nha bn
k cho mik nha mik cảm ơn khi các bn k cho mik và xin lỗi vì ko có dịp cảm ơn
10 x 5 + 5 10 + 10 + 5
= 50 + (10 + 10) + ( 5 + 5 )
= 50 + 20 + 10
= 70 + 10
= 80
100 + x = 15 + 15
100 + x = 30
x = 100 - 30
x = 70
Giải các phương trình:
a) \(\dfrac{x+2001}{5}+\dfrac{x+1999}{7}+\dfrac{x+1997}{9}+\dfrac{x+1995}{11}=-4;\)
b) \(\dfrac{x-15}{100}+\dfrac{x-10}{105}+\dfrac{x-100}{110}=\dfrac{x-100}{15}+\dfrac{x-105}{10}+\dfrac{x-110}{5}.\)
a: \(\Leftrightarrow\left(\dfrac{x+2001}{5}+1\right)+\left(\dfrac{x+1999}{7}+1\right)+\left(\dfrac{x+1997}{9}+1\right)+\left(\dfrac{x+1995}{11}+1\right)=0\)
=>x+2006=0
=>x=-2006
b: \(\Leftrightarrow\left(\dfrac{x-15}{100}-1\right)+\left(\dfrac{x-10}{105}-1\right)+\left(\dfrac{x-100}{5}-1\right)=\left(\dfrac{x-100}{15}-1\right)+\left(\dfrac{x-105}{10}-1\right)+\left(\dfrac{x-110}{5}-1\right)\)
=>x-105=0
=>x=105
Tính giá trị :
a) 100 x 15 + 100 x 95 - 100 x 10
b) 8 : 4 x 5 + 15 - 5
a) 100 x 15 + 100 x 95 -100 x10
= 100 x ( 15 +95 - 10 )
= 100 x 100
= 10000
b) 8: 4 x 5 + 15-5
= 2 x 5 + 15-5
= 10+15 -5
= 25-5
= 20
a) 100x15+100x95-100x10
=100x(15+95-10)
=100x100
=10000
mik chỉ làm 1 phần thôi nha
k mik nha cac bạn
a) 100 x 15 + 100 x 95 - 100 x 10
= 100 x (15+95-10)
= 100 x 100
= 10000
b) 8 : 4 x 5 + 15 - 5
=2 x5 + 10
=10+10
= 20
tìm x:
a)200-3x(x-16)=20
b)5+10+15+...+95+100+x=1200
c)x+(99-97+95-93+91-89+...+7-5+3-1)=100
a, 200 - 3( x - 16 ) = 20
3( x - 16 ) = 200 - 20 = 180
x - 16 = 180 : 3 = 60
x = 60 + 16 = 76
b, 5 + 10 + 15 + .............. + 95 + 100 + 105 = 1200
c, x + ( 99 - 97 + 95 - 93 + ............ + 7 - 5 + 3 - 1 ) = 100
x + ( 2 . 25 ) = 100
x + 50 = 100
x = 100 - 50 = 50
****, thks