- 16 + 23 + x = - 16
7 + x = - 16
x = - 16 - 7
x = - 23
mk nha
-16 + 23 + x = -16
7 + x = -16
x = (-16) - 7
x = -23
chuk bn hok tốt
-16 + 23 + x = -16
23 + x = -16 - (-16)
23 + x = -16 + 16
23 + x = 0
x = 0 -23
x = -23
-16 + 23 + x = -16
7 + x = -16
x = -16 - 7
x = -23