\(\left[{}\begin{matrix}x-15=0\\x-17=0\end{matrix}\right.\left[{}\begin{matrix}x=15\\x=17\end{matrix}\right.\)
\(\left[{}\begin{matrix}x-15=0\\x-17=0\end{matrix}\right.\left[{}\begin{matrix}x=15\\x=17\end{matrix}\right.\)
(x –15) .15 = 0 b) 32 (x –10 ) = 32
c) ( x – 5)(x – 7) = 0 d) (x – 35).35 = 35
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
Tìm x eN biết
a) (x –15) .15 = 0 b) 32 (x –10 ) = 32 c/ ( x – 5)(x – 7) = 0 d/ (x – 35).35 = 3
a,25+[x+17]=0 ; b'20-[x+12]=0 ; c, 15+[5-x]=-7 ; d, 3-5+[-x+3]=6 ; e, 25-[30+x]=x-[27-8] ; f, [x-12]-15=[20-7]-[18+x]
tìm x biết:
-15-(5-x)=2-x
4x-15-(3x+5)=0
(x+2)*(x-7)=0
x*(x-3)=0
Giúp mình với các bạn ơi
bài 19: tìm x
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
nhanh nha, mik tick cho, ccau trình bày dễ hiểu, ko cần ''hoặc''
bài 1: tính nhanh
a,15 x 12 + 15 x 4 +15
b, 3 x 125 x 121 x 8
c, 98 x 122 + 264
d, 367 + 129 + 133 + 371 + 17
bài 2: tìm x
a, ( x + 60 ) - 160 = 0
b, 4221 : ( x - 16 ) = 21
c, 7 x x - 7 = 714
d, 4 x x : 13 = 0
e, 0 : x = 0
g, 2448 : [ 119 -(x - 6)] = 24
Tìm x,biết: a.-12(x-5)+7(3-x)=5
b.(x-2).(x+4)=0
c.(x-2).(x+15)=0
d.(7-x).(x+19)=0
Tìm x thuộc Z biết
a,-12.(x-5)+7.(3-x)=5
b,-15(x-2)+7.(3-x)=7
c,(x-3).(x-5)<0
d,(x-5).(x-7)>0