At the carnival, alana gave away 26 ride tickets to her friends. she now has 57 tickets left. let x be the number of tickets that alana started with.
write an equation describing this situation that could be used to find the value of x.

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is