x-57/7=270
x=270+57/7
x=1890/7+57/7
x=1947/7
x-57/7=270
x=270+57/7
x=1890/7+57/7
x=1947/7
x - 280 : 35 = 5 . 54
3/7=x/56
x/5=21/35
42/54=7/x
35/x=7/15
1,Tính nhanh
a, 568 + 568 x 135 - 568 x 36
b, 17 x 49 + 49 x 37 + 54 x 26 + 54 x 25
c, 14 x 35 x 5 + 10 x 25 x 7 + 20 x 70
Tính nhanh :
a . 29 x 64 + 116 x 34
b . 136 x 68 + 16 x 272
Tim x
c 180 - 23 x ( x - 5 )
d ( x - 280 ) x 35 = 54
g x - 280 : 35 = 54
e 12 x ( x - 6 ) : 4 = 72
Tìm số nguyên x, biết:
a) 3 − 5 = x + 5 10
b) x − 4 6 = 1 − 3
c) 3 5 = − 9 3 x
d) 5 7 = 2 x 14
e) 5 − x 2 = 2 5 − x
f) 4 − x − 5 = − 5 4 − x
1) 42/35 - [ 33/14 . 21/22 - ( 54/25 : 27/25 - 7/10 )]
2) a) 5/21 . x/34 = 35/102 b) 15/x . 21/13 = 45/91
Ét o ét giúp mình với ạ><!!
Tìm x \(\varepsilon\)Z biết :
a, x - 43 = ( 35 - x ) - 48
b, 305 - x + 14 = 48 + ( x - 23 )
c, ( x - 6 + 85 ) = ( x + 51 ) - 54
d, -( 35 - x ) - ( 37 - x ) = 33 - x
e, - 12. ( x - 5 ) + 7 . ( 3 - x ) = 5
f, 30. ( x+ 2 ) - 6 . ( x - 5 ) - 24 = 100
(x-6+35)=(x+51)-54
Tìm x
A 54+(218-x)=735
B 96-3(x+1)=42
C 5(x+35)=515
D 12x-33=3^2.3^2