Toán Lớp 6: I. Tìm X
a) ( x-15 ) x 35 =0
b) 315+ ( 125-x )= 435
c)x-105 : 21 =15
d)(x – 105) : 21=15
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 6: I. Tìm X
a) ( x-15 ) x 35 =0
b) 315+ ( 125-x )= 435
c)x-105 : 21 =15
d)(x – 105) : 21=15
Comments ( 2 )
a)
(x-15)xx35=0
=>x-15=0:35
=>x-15=0
=>x=0+15
=>x=15
Vậy x=15
b)
315+(125-x)=435
=>125-x=435-315
=>125-x=120
=>x=125-120
=>x=5
Vậy x=5
c)
x-105:21=15
=>x-5=15
=>x=15+5
=>x=20
Vậy x=20
d)
(x-105):21=15
=>x-105=15xx21
=>x-105=315
=>x=315+105
=>x=420
Vậy x=420