4a+(4a+3).....pls simplify to get answer as a=?

4 a + ( 4a + 3 ) = 8 a + 3

pls tell a=-5?

Why do you think a = -5?

You haven't posted an equation.

is it 8a+3......then a = 3-8=-5

No.

8a means 3 times an unknown number.

8a + 3 means 8 times an unknown number plus 3

The only way we can determine the value of a is in an equation. For instance,

8a + 3 = 83

8a = 83 - 3

8a = 80

a = 10

ty vmuch

yvw