a) (x-34).15=0 ; b)18.(x-16)=18
a)(x-34).15=0 b)18.(x-16)=18
a, Tích (x-34).15=0 nên phải có ít nhất 1 thừa số =0.Vì 15 =/ 0 nên x-34=
b,x-16=.....:......
x-16=.........
x =....+.....
x=.........
can gap trong vong 5 phut
a)(x-34).15=0
\(\left(x-34\right)0:15=0\)
= \(\left(x-34\right)=0\Rightarrow x=0+34=34\)
B) 18.(x-16)=18
( x - 16 ) = 18 : 18
( x - 16 ) = 1
=> x = 1 + 16
= 17
\(a.\left(x-34\right).15=0\)
\(x-34=0:15\)
\(x-34=0\)
\(x=0+34\)
\(x=34\)
a) ( x-34).5=0
x-34=0
x=34
VAy x=34
b)18.(x-16)=18
x-16=1
x=17
Vay x=17
a /(x -34 ).15 = 0
b/ 18 .(x-16)=18
a) (x-34) *15=0
x- 34= 0
x= 34
b) 18 (x-16)=18
x-16= 1
x= 17
Tìm x thuộc Z,biết:
a)(71+x)-(-24-x)+(-35-x)=0
b)x-34-[(15+x)-(23-x)]=0
a) (71+x)-(-24-x)+(-35-x)=0 b)x-34-[(15+x)-(23-x)]=0
71+x+24+x+-35-x =0 x-34-15-x-23+x =0
(x+x-x)+(71+24-35) =0 (x-x+x)+(-34-15-23) =0
x+60 =0 x+-72 =0
x =0-60 x =0-(-72)
x = -60 x = 72
tìm số tự nhiên x .biết : a) 245 - (x-6) = 18 b) (x-34) nhan 15 - 15 = 0
a. 245 - ( x - 6 ) = 18
x - 6 = 245 - 18
x - 6 = 227
x = 227 + 6 = 233
b, ( x - 34 ) . 15 - 15 = 0
( x - 34 ) . 15 = 15
x - 34 = 15 : 15 = 1
x = 1 + 34 = 35
b) ( x - 34 ) . 15 - 15 = 0
=> ( x - 3 4 ).15 = 15
=> x - 34 = 15 : 15
=> x- 34 = 1
=> x = 1 + 34
=> x = 35
a) 245 - ( x - 6 ) = 18
x - 6 = 245 - 18
x - 6 = 227
x = 227 + 6
x = 233
b) ( x - 34 ) nhan 15 - 15 = 0
( x - 34 ) nhan 15 = 15
( x - 34 ) = 15 : 15
( x- 34 ) =1
x = 1 + 34
x= 35
Giải giúp mình nha các bạn. Cảm ơn nhiều nha.
Tìm x
a/ 78.( x-2 ) = 78
b/34.x = 0
c/ ( x-34 ). 15 = 0
a) \(78\left(x-2\right)=78\)
\(=>x-2=1\)
\(=>x=3\)
b) \(34.x=0\)
\(=>x=0\)
c) \(\left(x-34\right).15=0\)
\(=>x-34=0\)
\(=>x=34\)
a) 78. (x-2) =78
x-2=1 => x=1+2=3
b, 34.x=0
=> x=0:34=0
c, (x-34).15=0
x-34 =0 => x=0+34= 34
a/ 78.(x-2)= 78 b/ 34.x= 0 c/ (x-34) . 15= 0
x-2= 78 : 78 x = 0.34 x- 34= 0: 15
x-2 = 1 x = 0 x - 34= 0
x= 1+2 x= 0+34
x=3 x = 34
a,(x-15)-75=0
b,72-(6.x+5)=55
c,575-(6.x+70)=445
d,(x-34).15=0
e,15+(18-x)=26
g,(x-5):16=2
a,(x-15)-75=0
x-15 =75
x =75+15
x =90
b,72-(6.x+5)=55
6.x+5=72-55
6.x+5=17
6.x=17-5
6.x=12
x=12:6
x=2
c,575-(6.x+70)=445
6.x+70=575-445
6.x+70=130
6.x=130-70
6.x=60
x=60:6
x=10
d,(x-34).15=0
x-34=0
x=34
e,15+(18-x)=26
18-x=26-15
18-x=11
x=18-11
x=7
g,(x-5):16=2
x-5=2.16
x-5=32
x=32+5
x=37
Tìm số tự nhiên x, biết:
a) ( x - 34 ) . 15 = 0
( x - 34 ) . 15 = 0
( x - 34 ) = 0 : 15
x - 34 = 0
x = 0 + 34
x = 34
( x - 34 ) . 15 = 0
=> x - 34 = 0 : 15
=> x - 34 = 0
=> x = 0 + 34
=> x = 34
a) (x-34).15=0
x bằng bao nhiêu vậy giúp mình với
a) (x-34).15=0
x-34 = 0 : 15
x-34 = 0
x = 0 + 34
x = 34
( x -34 ) . 15 = 0
( x - 34 ) = 0 : 15
( x -34 ) = 0
x = 0 + 34
x = 34
- Chúc bạn học tốt !
bài 19: tìm x
a) 5 . ( x - 7 ) = 0
b) 25 ( x - 4 ) = 0
c) ( 34 - 2x ) . ( 2x - 6 ) = 0
d) ( 2019 - x ) . ( 3x - 12 ) 0
e) 57 . ( 9x - 27 ) = 0
f) 25 + ( 15 - x ) = 30
g) 43 - ( 24 - x ) = 20
h) 2 . ( x - 5 ) - 17 = 25
i) 3 . ( x + 7 ) - 15 = 27
j) 15 + 4 . ( x - 2 ) = 95
k) 20 - ( x + 14 ) = 5
l) 14 + 3 . ( 5 - x ) = 27
a) \(5\left(x-7\right)=0\)
\(\Rightarrow x-7=0\)
\(\Rightarrow x=7\)
b) \(25\left(x-4\right)=0\)
\(\Rightarrow x-4=0\)
\(\Rightarrow x=4\)
c) \(\left(34-2x\right)\left(2x-6\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}34-2x=0\\2x-6=0\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}2x=34\\2x=6\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=17\\x=3\end{matrix}\right.\)
d) \(\left(2019-x\right)\left(3x-12\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}2019-x=0\\3x-12=0\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=2019\\3x=12\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x=2019\\x=\dfrac{12}{3}=4\end{matrix}\right.\)
e) \(57\left(9x-27\right)=0\)
\(\Rightarrow9x-27=0\)
\(\Rightarrow9\left(x-3\right)=0\)
\(\Rightarrow x-3=0\)
\(\Rightarrow x=3\)
a) 5.(x-7)=0⇔x-7=0⇔x=7
b) 25(x-4)=0⇔x-4=0⇔x=4
c) (34-2x).(2x-6)=0
⇔ 34-2x=0 hoặc 2x-6=0
⇔2x=34 hoặc 2x=6
⇔ x=17 hoặc x=3
d) (2019-x).(3x-12)=0
⇔ 2019-x=0 hoặc 3x-12=0
⇔ x=2019 hoặc x=4
e) 57.(9x-27)=0
⇔ 9x-27=0
⇔ x=3
f) 25+(15-x)=30
⇔ 15-x=5
⇔ x=10
g) 43-(24-x)=20
⇔ 24-x=23
⇔ x=1
h) 2.(x-5)-17=25
⇔ 2(x-5)=42
⇔x-5=21
⇔ x=26
i) 3(x+7)-15=27
⇔ 3(x+7)=42
⇔ x+7=14
⇔ x=7
j) 15+4(x-2)=95
⇔ 4(x-2)=80
⇔ x-2=20
⇔ x=22
k) 20-(x+14)=5
⇔ x+14=15
⇔ x=1
l) 14+3(5-x)=27
⇔ 3(5-x)=13
⇔ 5-x=13/3
⇔ x=5-13/3
⇔ x=2/3