Theo bài ra ta có:
4,25 x (b + 41.53 ) - 125 =300
4,25 x (b + 41.53 ) = 300 +125
4.25 x ( b + 41.53 ) = 425
b + 41.53 = 425 : 4,25
b +41.53 =100
b = 100 - 41,35
b = 58,65
4,25 x (b + 41.53 ) - 125 =300
4,25 x (b + 41.53 ) = 300 +125
4.25 x ( b + 41.53 ) = 425
b + 41.53 = 425 : 4,25
b +41.53 =100
b = 100 - 41,35
b = 58,65