tìm x
a, |x+3| -12 = |-5|
b, 25 - (x-5) = 415 x (15 - 415 )
Tìm x :
a) 3x-17=x+3
b) |x-3|-12=|-5|
c) 2,5-(x-5)=-415-(15-415)
a) 3x-17=x+3
3x-x=17+3
2x=20 =>x=10
b) |x-3|-12=|-5|
|x-3|=17
x-3=17 hoặc x-3=-17
nếu x-3=17 thì x=20
nếu x-3=-17 thì x=-14
c) 2,5-(x-5)=-415-(15-415)
2,5-(x-5)=-15
x-5=2,5+15
x-5=17,5 =>x=22,5
a,3x-17=x+3
3x-x=3+17
2x=20
x=20:2
x=10
b,/x-3/-12=/-5/
/x-3/-12=5
/x-3/=17
suy ra ; x-3=-17 or x-3=17
x=-17+3 x =17+3
x=-14 x=20
c,2,5-(x-5)=-415-(15-415)
2,5-(x-5)=-15
x-5=2,5-(-15)
x-5=17,5
x=17,5+5
x=22,5
x=-14
tìm x :
a) 3 - ( 17 - x ) = 289 - ( 36 + 289 )
b) 25 - ( x + 5) = - 415 - ( 15 - 415 )
c) 3 ( x - 1) - ( x - 5 ) = 8
tìm số nguyên x biết:
a)3x-17=x+3
b)|x-3|-12=|-5|
c)25-(x-5)=-415-(15-415)
d)2x-15=-47
e)(-5)^2-(5x-3)=43
g)(x-3)(2x+6)=0
giải nhanh hộ mìh nhé
mình đang cần gấp
bài 1: tìm x, biết
a, 3-(17-x)=289-(36+289)
b,25-(x+5)=(-415)-(15-415)
c,34+(21-x)=(3747-30) -3746
a)-22: b)35: c)84
1, 3x-17=x+3
2, |x-3|-12=|-5|
3, 25-(x-5)=-415-(15-415)
4, (x-3)(2x+6)=0
1. 3x - 17 = x+3
3x - x = 3 + 17
2x = 20
x = 20 :2
x = 10
2. |x-3| - 12 = |-5|
|x-3| -12 = 5
|x-3| = 5 + 12
|x-3| = 17
=> x-3 = +17 , -17
x - 3 = 17x = 17 + 3
x = 20
x - 3 = -17x = -17 + 3
x = -14
3 . 25 - ( x -5 ) = -415 -( 15 -415)
25 - x +5 = -415 - 15 +415
25 - x +5 = ( -415 + 415) -15
25 - x +5 = 0-5 = -5
25 - x = -5-5
25 - x = -10
x = 25 - -10
x = 35
4. ( x -3 ) . ( 2x +6 ) = 0
=> x-3 = 0 hoặc 2x +6 = 0
x - 3 = 0x = 0 + 3 = 3
2x +6 = 02x = 0-6=-6
x = -6 : 2
x = -3
\(1;3x-17=x+3\)
\(\Leftrightarrow3x-x=3+17\)
\(\Leftrightarrow2x=20\)
\(\Rightarrow x=10\)
\(2;\left|x-3\right|-12=\left|-5\right|\)
\(\Leftrightarrow\left|x-3\right|-12=5\)
\(\Leftrightarrow\left|x-3\right|=5+12\)
\(\Leftrightarrow\left|x-3\right|=17\)
\(\Rightarrow\orbr{\begin{cases}x-3=17\\3-x=17\end{cases}\Leftrightarrow}\orbr{\begin{cases}x=17+3\\-x=17-3\end{cases}\Leftrightarrow\orbr{\begin{cases}x=20\\x=-14\end{cases}}}\)
\(3;25-\left(x-5\right)=-415-\left(15-415\right)\)
\(\Leftrightarrow25-x+5=-415-15+415\)
\(\Leftrightarrow-x=-415-15+415-25-5\)
\(\Leftrightarrow-x=-45\)
\(\Rightarrow x=45\)
\(4;\left(x-3\right)\left(2x+6\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-3=0\\2x+6=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=3\\x=-3\end{cases}}}\)
3x-17=x+3
3x-x=3+17
2x=20
x=10
lx-3l - 12 = l-5l = 5
lx-3l = 5+12=17
<=>\(\orbr{\begin{cases}x-3=17\\x-3=-17\end{cases}\Leftrightarrow\orbr{\begin{cases}x=20\\x=-14\end{cases}}}\)
tìm số nguyên x,biết
a/ 3-(17-x)=289-(36+289)
b/ 25-(x+5)=-415-(15-415)
c/ 34+(21-x)=(3747-30)-3746
tim so nguyen x, biet
a, 3-[17-x] = 289-[36+289]
b,25-[x+5]=-415-[15-415]
a)3-[17-x]=289-325
[17-x]=3-(289-325)
[17-x]=3-(-36)
[17-x]=39
x=17-39
x=-22
b)25-[x+5]=-415-[15-415]
25-[x+5]=-415+400
25-[x+5]=-15
[x+5]=25+15
[x+5]=40
x=40-5
x=35
bài 1 : tìm số nguyên x biết
a, 3- (17-x) = 289 - (36+289)
b, 25- (x+5) = - 415 - (15 - 415)
các bạn làm nhanh trong trưa nay hộ mình với huhu
a, 3- (17-x) = 289 - (36+289)
3 - (17 - x )= 289 - 325
3 - (17 - x )= -36
17 - x =3 - (-36)
17 - x =39
x = 17 - 39
x = -22
b, 25- (x+5) = - 415 - (15 - 415)
25 - ( x + 5)= -415 - (-400)
25-( x + 5 ) =-15
x + 5 = 25 - (-15)
x+5 =40
x = 40 -5
x=35
hok tốt !
a.484+x=(-632)+(-548)
b.(-x)+(-62)+(-46)=-14
c.25+(x-5)=-415-(15-415)
\(a)484+x=\left(-632\right)+\left(-548\right)\)
\(484+x=-1180\)
\(x=(-1180)-484\)
\(x=-1664\)
\(b)\left(-x\right)+\left(-62\right)+\left(-46\right)=-14\)
\(\left(-x\right)+\left(-62\right)=-14-\left(-46\right)\)
\(\left(-x\right)+\left(-62\right)=-14+46\)
\(\left(-x\right)+\left(-62\right)=32\)
\(\left(-x\right)=32-\left(-62\right)\)
\(\left(-x\right)=32+62\)
\(\left(-x\right)=94\)
\(\Rightarrow x=94\)
\(c)25+\left(x-5\right)=-415-\left(15-415\right)\)
\(25+\left(x-5\right)=-415-\left(-400\right)\)
\(25+\left(x-5\right)=-415+400\)
\(25+\left(x-5\right)=-15\)
\(x-5=-15-25\)
\(x-5=-40\)
\(x=-40+5\)
\(x=-35\)
thank you @lê thị thanh huyền