a)\(70-5.\left(x-3\right)=45\)
\(5.\left(x-3\right)=70-45\)
\(5.\left(x-3\right)=25\)
\(x-3=25:5\)
\(x-3=5\)
\(x=5+3\)
\(x=8\)
b) \(10+2.x=4^5:4^3\)
\(10+2.x=4^2\)
\(10+2.x=16\)
\(2x=16-10\)
\(2x=6\)
\(x=6:2\)
\(x=3\)
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
b)10+2x=4^5:4^3
10+2x=4^2
10+2x=16
2x=16-10
2x=6
x=6:2
x=3
a) 70 - 5 . ( x - 3 ) = 45
65 . ( x - 3 ) = 45
x - 3 = 45 . 65
x - 3 = 2925
x = 2925 + 3
x = 2928
b) 10 + 2x = 45 : 43
10 + 2x = 45-3
10 + 2x = 42
10 + 2x = 16
2x = 16 - 10
2x = 6
x = 6 : 2
x = 3
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
b)10+2.x=45:43
= 10+2.x=16
2.x=16-10
2.x=6
x=6:2
x=3
HỌC TỐT NHA BẠN !
a,5.(x-30)=70-45
5.(x-30)=25
x-30=25/5
x-30=5
x=25
b,10+2.x=42
10+2.x=16
2.x=16-10
2.x=6
x=6/2
x=3
k mình nha
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
a) 5.(x-3)=70-45
5.(x-3)=25
x-3 =25:5
x-3=5
x=5+3
x=8