(a + b) x c = a x c + b x c :
$8,75 \times x + 1,25 \times x = 20$
$ (8,75 + 1,25) \times x =20$
$10 \times x = 20$
$x = 20 : 10$
$x = 2$
Result: x = 2
Vậy x = 2
(a + b) x c = a x c + b x c :
$8,75 \times x + 1,25 \times x = 20$
$ (8,75 + 1,25) \times x =20$
$10 \times x = 20$
$x = 20 : 10$
$x = 2$
Result: x = 2
Vậy x = 2