90. For the first position,you can have one of 10 ppl in president/vice president. Then the remaining 9 ppl can be put in the remaining position. 10 * 9 = 90. If you need more explantion check these keywords. Factorial, permutations, combinations.
10x-4=9x+2. I think this is the equation it is saying. If so, x=6.
Hello here is a solution :
Answer:
44
Step-by-step explanation:
180-96=84
180-128=52
52+84=136
180-136=44
