a. 2x - 3 = 125 : 25
2x - 3 = 5
2x = 5 + 3
2x = 8
x = 8 : 2 = 4
b. 472 : ( 24 + 5x ) + 8 = 16
( 24 + 5x ) + 8 = 472 : 16
( 24 + 5x ) + 8 = 29,5
24 + 5x = 29,5 - 8
24 + 5x = 21,5
5x = 21,5 - 24
5x = -2,5
x = -2,5 : 5 = -0,5
a.
(2x - 3).25 =125
2x - 3 =125 : 25
2x - 3 = 5
2x =5 + 3
2x = 8
x = 8 :2
x =4
b.
472 : (24 +5x) + 2 mủ 3 =16
472 :(24 + 5x) + 8 = 16
472 :(24 + 5x) = 16 - 8
472 :(24 + 5x) = 8
24 + 5x = 472 : 8
24 + 5x =59
5x = 59 - 24
5x = 35
x =35:5
x = 7
5x =
472:4 dư bao nhiêu
