What is the answer to -7x-3x+2=-8x-8

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

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

What is the least common factor of 6 and 8