[(2x - 11) : 3 + 1].5 = 20
[(2x - 11) : 3 + 1] = 20 : 5
[(2x - 11) : 3 + 1] = 4
(2x - 11) : 3 = 4 - 1
(2x - 11) : 3 = 3
2x - 11 = 3 x 3
2x - 11 = 9
2x = 9 + 11
2x = 20
x = 20 : 2
x = 10
[(2x - 11) : 3 + 1].5 = 20
[(2x - 11) : 3 + 1] = 20 : 5
[(2x - 11) : 3 + 1] = 4
(2x - 11) : 3 = 4 - 1
(2x - 11) : 3 = 3
2x - 11 = 3 x 3
2x - 11 = 9
2x = 9 + 11
2x = 20
x = 20 : 2
x = 10
xin 1 like
<( 2x - 11 ):3+1> = 20 : 5
( 2x - 11 ):3+1 = 4
( 2x - 11 ) : 3 = 4-1
(2x - 11 ) : 3 = 3
( 2x - 11 ) =3:3
2x - 11 = 1
2x = 1 + 11
2x = 12
x = 12 : 2
x = 6
''<'' và ''>'' là ngoặc vuông nhek mà mik nghĩ bn nên đợi mn ra KQ chứ mik sợ mik lm ẩu lắm
[(2x - 11) : 3 + 1].5 = 20
[(2x - 11) : 3 + 1] = 20 : 5
[(2x - 11) : 3 + 1] = 4
(2x - 11) : 3 = 4 - 1
(2x - 11) : 3 = 3
2x - 11 = 3 . 3
2x - 11 = 9
2x = 9 + 11
2x = 20
x = 20 : 2
x = 10
[(2x - 11) : 3 + 1].5 = 20
[(2x - 11) : 3 + 1] = 20 : 5
[(2x - 11) : 3 + 1] = 4
(2x - 11) : 3 = 4 - 1
(2x - 11) : 3 = 3
2x - 11 = 3 x 3
2x - 11 = 9
2x = 9 + 11
2x = 20
x = 20 : 2
x = 10
