Question

x-23=40
2x=24-1x
3x=20-2x
2x+10=20
3x-18=x

Answer 1

$x-23=40\\x=40+23=63\\\\3x=20-2x\\5x=20\\x=4\\\\2x+10=20\\x=5\\\\3x-18=x\\2x=18\\x=9$

Answer 2

x-23=40

x= 40 + 23

x= 63

2x=24-1x

2x + x = 24

3x = 24

x= 24/3

x= 8

3x=20-2x

3x + 2x = 20

5x = 20

x= 20/5

x= 4

2x+10=20

2x = 20 - 10

2x = 10

x= 10/2

x= 5

3x-18=x

3x - x = 18

2x = 18

x= 18/2

x= 9