Diketahui persamaan 2x + 7 = 5x + 22, maka nilai x + 10 adalah ... .

[tex]2x + 7 = 5x + 22 = > 2x - 5x = 22 - 7 = > - 3x = 15 = > x = \frac{15}{ - 3} = - 5[/tex]
jadi nilai
[tex]x + 10 = - 5 + 10 = > 5[/tex]

jawab:
2x + 7 = 5x + 22
2x - 5x = 22-7
-3x = 15
x = 15/-3
x = -5
substitusikan x = -5 ke persamaan x + 10
= x + 10
= -5 + 10
= 5