a ) x : 13 = 41
x = 41 x 13
x = 533
b) 1428 : x = 14
x = 1428 : 14
x = 102
x ) 7x - 8 = 713
7x = 713 + 8
7x = 721
x = 721 : 7
x =103
d ) 8 ( x - 3 ) = 0
( x - 3 ) = 0 : 8
( x - 3 ) = 0
x = 0 + 3
x = 3
a) \(x:13=41\Rightarrow x=41.13=533\)
b) \(1428:x=14\Rightarrow x=1428:14=102\)
c) \(7x-8=713\Rightarrow7x=713+8\Rightarrow7x=721\Rightarrow x=721:7=103\)
d) \(8\left(x-3\right)=0\Leftrightarrow8x-24=0\Leftrightarrow8x=24\Leftrightarrow x=24:8=3\)
Nếu đúng thì k cho mình với nha!
a) ta co x.13=41 =>x=41/13
b) 1428:x =14 =>x=1428:14 =>x=102
c) 7x-8 =713 =>7x=721 =>x=103
d) 8(x-3) =0
ma 8 khac 0 =>x-3=0 =>x=3
x:13=41
x =41*13
x =533
1428:x=14
x=1428:14
x=102
7x-8=713
7x =713+8
7x =721
x =721:7
x =103
8(x-3)=0
x-3 =0:8
x-3 =0
x =0+3
x =3