Question

7(x-3) = 0

45 - 2(x+1) = 31

(x-35) -18 =0 

Answer 1

a: =>x-3=0

hay x=3

b: =>2(x+1)=14

=>x+1=7

hay x=6

c: =>x-53=0

hay x=53

Answer 2

x-3=0

x=3

2(x-1)=14

x-1=7

x=8

x-35=18

x=18+35

x= 53

Answer 3

`7.(x-3)=0`

`x-3=0:7`

`x-3=0`

`x=0+3`

`x=3`

_______________________

`45-2.(x+1)=31`

`2.(x+1)=45-31

`2.(x+1) = 14`

`x+1=14:2`

`x+1=7`

`x=7-1`

`x=6`

_________________________

`(x-35)-18=0`

`x-35=0+18`

`x-35=18`

`x=18+35`

`x=53`

Answer 4

\(\text{a},x-3=0:7\\ x=3\\ b,-2\left(x+1\right)=45-31\\ -2\left(x+1\right)=14\\ X+1=7\\ x=6\\ c,x-35=18\\ x=18+35=53\)

Answer 5

\(7(x-3) = 0\)

\(x-3 = 0:7\)

\(x-3 = 0\)

\(x=0+3=3\)

\(-------------------\)

\(45 - 2(x+1) = 31\)

\( 2(x+1) =45 - 31\)

\( 2(x+1) =14\)

\(x+1 =14:2\)

\(x+1 =7\)

\(x=7-1=6\)

\(----------------\)

\((x-35) -18 =0 \)

\(x-35= 0+18 \)

\(x-35=18\)

\(x=18+35\)

\(x=53\)

Answer 6

`7(x-3) = 0`

`=> x-3 = 0 : 7`

`=> x-3 = 0`

`=>  x   = 0 + 3`

`=> x   = 3`

______________________________

`45 - 2(x+1) = 31`

`=>  2(x + 1) = 45 - 31`

`=> 2(x+1)   = 14`

`=>   x+1     = 14 : 2`

`=>   x + 1   = 7`

`=>   x          = 7-1`

`=>   x            = 6`

_________________________________________

`(x-35) - 18 = 0`

`=> x - 35   = 0 + 18`

`=> x- 35    = 18`

`=> x          = 18 + 35`

`=> x          = 53`

Answer 7

7 (x-3) = 0

\(\Leftrightarrow7x-21=0\\ \Leftrightarrow7x=21\\ \Leftrightarrow x=3\)

 

\(45-2\left(x+1\right)=31\\ \Leftrightarrow45-2x-2=31\\ \Leftrightarrow-2x=-12\\ \Leftrightarrow x=6\)

 

\(\left(x-35\right)-18=0\\ \Leftrightarrow x-35=18\\ \Leftrightarrow x=53\)