Sagot :
[tex]*\\Justin's\ songs-\ \ 3x+12\\
Jim's\ songs-\ \ 5x-4\\\\The\ same\ amount\ so:\\
3x+12=5x-4\ \ \ |Subtract\ 3x\\
12=2x-4\ \ \ |Add\ 4\\
16=2x\ \ |Divide\ by\ 2\\
x=8\\\\3x+12=3*8+12=24+12=36\\5x-4=5*8-4=40-4=36\\\\
Justin\ has\ 36\ sons\ and\ Jim\ has\ also\ 36\ songs.[/tex]
according to the quesiton;
3x + 12 = 5x -4
12 + 4 = 5x - 3x
16 = 2x
16 / 2 = x
8 = x
x = 8
Now, substituting the value of "x" in one of the equation, we get,
3x + 12
= 3 (8) + 12
= 24 + 12
= 36
5x- 4 = 36 ...........because according to the question, 3x + 12 = 5x - 4
So, each of them have 36 songs
3x + 12 = 5x -4
12 + 4 = 5x - 3x
16 = 2x
16 / 2 = x
8 = x
x = 8
Now, substituting the value of "x" in one of the equation, we get,
3x + 12
= 3 (8) + 12
= 24 + 12
= 36
5x- 4 = 36 ...........because according to the question, 3x + 12 = 5x - 4
So, each of them have 36 songs