a) (10,6+7,19):x=3
=> 17,79:x=3
=> x=17,79:3
=> x=5,93
b) 7:x-3,9:x=5
=> (7-3,9):x=5
=> 3,1:x=5
=> x=3,1:5
=> x=0,62
( 10,6 + 7,19 ) : x = 3
17,79 : x = 3
x = 17,79 : 3
x = 5,93
( 7 - 3,9 ) : x = 5
3,1 : x = 5
x = 3,1 : 5
x = 0,62
a)10,6:X+7,19:X=3
(10,6+7,19):X=3
17,79:X=3
X=17,79:3
X=5,93
Vậy X=5,93.
b) 7:x-3,9:x=5
(7-3,9):x=5
3,1:x=5
x=3,1:5
x=0,62
Vậy x=0,62.
X = 5.93 ( a)
X = 0.62 ( b )