Solve for a. 2(a+4)+6a=48 enter your answer in the box. a =

Ineed to know the answer to this algebra question.

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.