Share
( 9x + 2 ) ×3 bằng 60
Question
Leave an answer
Hưng Gia
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Answers ( )
Bài 2:
a)70-5.(x-3)=45
5.(x-3)=70-45
5.(x-3)=25
x-3=25:5
x-3=5
x =5-3=2
b)10+2x=$4^{5}$ ; $4^{3}$
10+2x=$4^{2}$ =16
2x=16-10
2x=6
x=6:2=3
c)(9x+2).3=60
9x+2 =60:3
9x+2 =20
9x =20-2
9x =18
x =18:9=2
Bài 2:
a)70-5.(x-3)=45
5.(x-3) =70-45
5.(x-3) =25
x-3 =25÷5
x-3 =5
x =5+3
x =8
Vậy x=8
b)10+2x=$4^{5}$÷4²
10+2x =$4^{3}$
10+2x =64
2x =64-10
2x =54
x =54÷2
x =27
Vậy x=27
c)(9x+2).3=60
9x+2 =60÷3
9x+2 =20
9x =20-2
9x =18
x =18÷9
x=2
Vậy x=2
d)71+(26-3x)÷5=75
(26-3x)÷5 =75-71
(26-3x)÷5 =4
26-3x =4×5
26-3x =20
3x =26-20
3x =6
x =6÷3
x =2
Vậy x=2
e)2019(x-2020)=0
x-2020 =0÷2019
x-2020 =0
x =0+2020
x =2020
Vậy x=2020
f)176.(2x-53)=176
2x-53 =176÷176
2x-53 =1
2x =1+53
2x =54
x =54÷2
x =27
Vậy x=27