a) 2 + x = 3
x = 3 - 2
x = 1
b) x + 6 = 0
x = 0 - 6
x = 0 + (-6)
x = -6
c) x + 7 = 1
x = 1 - 7 x
= 1 + (-7)
x = -6
a) 2+x=3 b) x+6=0 c) x+7=1
x = 3-2 x = 0-6 x =1-7
x=1 x = -6 x = -6
a)2 + x = 3
x = 3- 2
x = 1
Vậy x = 1
b)x + 6 = 0
x = 0 - 6
x = -6
Vậy x = -6
c)x + 7 = 1
x = 1- 7
x = -6
Vậy x = -6