a)70-5(x-3)=45
<=>5(x-3)=70-45
<=>5(x-3)=35
<=>x-3=35:5
<=>x-3=7
<=>x=7+3
<=>x=10
b)10+2x=45:43
<=>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
a) 70 - 5 . ( x - 3 ) = 45
5 . ( x - 3 ) = 70 - 45
5 . ( x - 3 ) = 25
( x - 3 ) = 25 : 5 Mik làm cho ban j rồi nhé bạn nhớ làm cho mik nha
x - 3 = 5
x = 5 - 3
x = 2
b) 10 + 2 . x = 45 : 45
10 + 2 . x = 4
2 . x = 10 - 4
2 . x = 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
Bạn NGUYỄN ĐẮC KHANG ơi \(4^5:4^3\)hay là \(4^5:4^5\)