a) ( x - 3) : 25 = 28
x - 3 = 28 x 25
x - 3 = 700
x = 700 + 3 = 703
b) ( 8 - x : 2 ) : 4 = 2
8 - x : 2 = 2 x 4
8 - x : 2 = 8
x : 2 = 8 - 8 = 0
=> x = 0
Bài làm :
\(a,\left(x-2\right):25=28\)
\(x-2=28.25\)
\(x-2=700\)
\(x=700+2\)
\(x=702\)
Vậy x = 702 .
\(b,\left(8-x:2\right):4=2\)
\(8-x:2=8\)
\(x:2=8-8\)
\(x:2=0\)
\(x=0\)
Vậy x = 0.
Học tốt
( x - 3 ) : 25 = 28
x - 3 = 28 . 25
x - 3 = 700
x = 700 + 3
x = 703
Vậy x = 703
( 8 - x : 2 ) : 4 = 2
8 - x : 2 = 2 . 4
8 - x : 2 = 8
x : 2 = 8 - 8
x : 2 = 0
x = 0 x 2
x = 0
Vậy x = 0