Answer:
5
Step-by-step explanation:
17x -8x -9 = 76 - 40
17x -8x = 76 - 40 + 9
9x = 45
x = 45/9
x=5
x = 5
17x - 8x - 9 = 76 - 40
9x - 9 = 36
+9 +9
/9 /9