himpunan penyelesaian 4- 2\5× -7=13

4 - ²/5 x - 7 = 13
-²/5 x - 3 = 13
-²/5 x = 13 + 3
-²/5 x = 16
-2x = 16 . 5
-2x = 80
x = 80 : -2
x = -40

HP = {-40}