6x -19 + 3x + 10 = 180
9x -9 = 180
9x = 189
x = 21
Answer:
20 is the Answer i think
Step-by-step explanation:
Answer:
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
To get the next number you have to subtract by 9, 51-9=42, 42-9=33, 33-9=24, and so 24-9=15. The pattern is n-9 (n=previous number) and the answer is 15
