x - 24 = 54
=> x = 54 + 24
=> x = 78
Vậy x = 78
8 - x = 6
=> x = 8 - 6
=> x = 2
Vậy x = 2
24 + x = 94
=> x = 94 - 24
=> x = 70
Vậy x = 70
77 + x = 90
=> x = 90 - 77
=> x = 13
Vậy x = 13
Bài làm
***x-24=54
x=54+24
x=78
***8-x=6
X=8-6
x=2
***24+x=94
x=94-24
x=70
***77+x=90
x=90-77
x=13
x - 24 = 54
x = 54 + 24
x = 78
8 - x = 6
x = 8 - 6
x = 2
24 + x = 94
x = 94 - 24
x = 70
77 + x = 90
x = 90 - 77
x = 13
x-24=54
x=54+24
x=78
8-x=6
x=8-6
x=2
24+x=94
x=94-24
x=70
77+x=90
x=90-77
x=23