1.Tìm x:a)60 - 3 (x - 2) = 51b)4 x - 20 = 2^5 : 2^2c)8.6 + 288 : (x - 3)^2=50d)70 - 5 ( x-3 ) = 50e)10 + 2 x = 4^5 : 4^3f)3^x - 4^3 = 17g)( 7x-11)^3 = 2^5 . 5^2 + 2002. Thực hiện phép tínha)2^4 . 38 - 264 . 37b)(2^9 . 3 + 2^9 . 5 : 2^9c)13^2 - ( 5^2 . 4 + 2^2 . 15 )d)15 . 141 + 59 . 15e)20 - [ 10 - (2021 - 1 )^0 ]f)17 . 85 + 15 . 17 -120g)2^3 . 17 - 2^3 ....
Đọc tiếp
1.Tìm x:
a)60 - 3 (x - 2) = 51
b)4 x - 20 = 2^5 : 2^2
c)8.6 + 288 : (x - 3)^2=50
d)70 - 5 ( x-3 ) = 50
e)10 + 2 x = 4^5 : 4^3
f)3^x - 4^3 = 17
g)( 7x-11)^3 = 2^5 . 5^2 + 200
2. Thực hiện phép tính
a)2^4 . 38 - 264 . 37
b)(2^9 . 3 + 2^9 . 5 : 2^9
c)13^2 - ( 5^2 . 4 + 2^2 . 15 )
d)15 . 141 + 59 . 15
e)20 - [ 10 - (2021 - 1 )^0 ]
f)17 . 85 + 15 . 17 -120
g)2^3 . 17 - 2^3 . 14
a) 60-3(x-2)=51
3(x-2)=60-51
3(x-2)=9
x-2 = 9:3
x-2 = 3
x = 3+2
x 5
b) 4x-20=2^5:2^2
4x-20=8
4x =8+20
4x =28
x =28:4
x = 7