a)95*(100-75)=95*(100-75) b)2003+10*15=2003+10*3*5
A) 95.(a-75)=95.(100-75)
=>a-75=100-75
vậy a =100
B) 2003+a.15=2003.10.3.5
a.15=10.3.5
xl bạn chưa xong
a.15=10.(3.5)
a.15=10.15
vậy a=10
a, 95 . ( a - 75 ) = 95 . ( 100 - 75 )
=> a - 75 = 100 - 75
vậy a = 100
b, 2003 + a . 15 = 2003 . 10 . 3 . 5
a . 15 = 10 . 3 . 5
a . 15 = 10 . ( 3 . 5 )
a . 15 = 10 . 15
a = 10