a)x:13=41 c)1428:x=14
x=41x13=533 x=1428:14=102
d)8(x-3)=0
Suy ra: x-3=0 x=0+3=3
a, x : 13 = 41
x = 41 x 13
x = 533
b, 1428 : x = 14
x = 1428 : 14
x = 102
c, 8(x - 3) = 0
x - 3 = 0 x 8
x - 3 = 0
x = 0 + 3
x = 3
\(x:13=41\) \(1428:x=14\) \(8\left(x-3\right)=0\)
\(x=41.13\) \(x=1428:14\) \(x-3=0\)
\(x=533\) \(x=102\) \(x=3\)
\(a,x:13=41\)
\(\Leftrightarrow x=41.13\)
\(\Leftrightarrow x=533\)
\(b,1428:x=14\)
\(\Leftrightarrow x=1428:14\)
\(\Leftrightarrow x=102\)
\(c,1428:x=14\)
\(\Leftrightarrow x=1428:14\)
\(\Leftrightarrow x=102\)
\(d,8.\left(x-3\right)=0\)
\(\Leftrightarrow x-3=0:8\)
\(\Leftrightarrow x-3=0\)
\(\Leftrightarrow x=0+3=3\)
a, x:13=41
x =41.13
x =533
b,1428:x=14
x=1428:14
x=102
d,8.(x-3)=0
x-3 =0:8
x-3 = 0
x =0+3
x =3
a)x:13=41 c)=b)
x=41.13 d)8(x-3)=0
x=533 x-3=0
b)1428:x=14 x=3
x=1428:14
x=102