At an animal shelter the number of dog adoptions one weekend was 10 less than 3 times the number of cat adoptions. the number of cat adoptions plus twice the number of dog adoptions was 8

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

How do you use the elimination method for this question? explain, because i really want to understand!

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude