3(4a+7)=5(2a+4)+1 what is it??

a = 0

Step-by-step explanation:

I moved all terms to the left:

3(4a+7)-(5(2a+4)+1)=0

I multiplied parentheses

12a-(5(2a+4)+1)+21=0

I calculated the terms in parentheses: -(5(2a+4)+1), so:

5(2a+4)+1

I multiplied parentheses

10a+20+1

I added all the numbers together, and all the variables

10a+21

Back to the equation:

-(10a+21)

I got rid of parentheses

12a-10a-21+21=0

I added all the numbers together, and all the variables

2a=0

a=0/2

a=0

Hope this is the answer you are looking for