Question

Need help is confused​

Answer 1

Answer: a = 3.6

Explanation:

`(2)/(3)(6a+9)=20.4\\\\\\\text{Distribute the }(2)/(3)\ \text{by multiplying it by each term in the parenthesis:}\\(2)/(3)(6a)+(2)/(3)(9)=20.4\\\\\\\text{Cancel out common terms then Multiply:}\\2(2a)+2(3)=20.4\\4a+6=20.4\\\\\text{Subtract 6 from both sides:}\\4a=14.4\\\\\text{Divide both sides by 4:}\\a=3.6`