4(3а+1.6)-(5+2а)-3(а-1.2)

Question

4(3а+1.6)-(5+2а)-3(а-1.2)

Answer 1

= 12а + 6,4 - 5 - 2а - 3а + 3,6 =
= (12а - 2а - 3а) + (6,4 + 3,6) =
= 7а + 10.