Answer:
[tex]9a + 3b[/tex]
Is the answer
Step-by-step explanation:
[tex]5(3a + b) - 2(3a + b) \\ = 15a + 5b - 6a - 2b \\ = 9a + 3b[/tex]
[tex]( - ) \times ( + ) = ( - ) \\ [/tex]
That is why
[tex]( - 2) \times b = - 2 [/tex]
And
[tex] ( - 2) \times 3a = ( - 6)[/tex]
