two fifths times(n+3)=4 what does n equal?

(2/5) ( n + 3 )  = 4    multiply both sides by 5/2

n + 3 = 4(5/2)

n + 3  = 10   subtract 3 from both sides

n = 7

The answer is 7.

Solve for n:
(2 (n+3))/5 = 4

Multiply both sides of (2 (n+3))/5 = 4 by 5/2:
((5×2 (n+3))/(2))/(5) = 5/2×4

5/2×4 = (5×4)/2:
(5×2 (n+3))/(2×5) = (5×4)/2

(5×2 (n+3))/(2×5) = (2×5)/(2×5)×(n+3) = n+3:
n+3 = (5×4)/2

4/2 = (2×2)/2 = 2:
n+3 = 5×2

5×2  =  10:
Answer: | n=7