We must simplify the following expression:
[tex]7a+2a-a+6b-5b[/tex]From the expression, we see that we have terms with variable a and terms with variable b. In order to simplify the expression, we add the terms with a together (which sums up 8a), and we do the same for the terms with b (which sums up 1b):
[tex]\begin{gathered} 7a+2a-a+6b-5b \\ =(7a+2a-a)+(6b-5b) \\ =8a+b \end{gathered}[/tex]The solution is: 8a+b
