I cant seem to solve this

Question

A 16​-inch board is to be cut into three pieces so that the second piece is 3 times as long as the first piece and the third piece is 4 times as long as the first piece. If x represents the length of the first​ piece, find the lengths of all three pieces

Answer 1

1st piece = x

2nd piece = 3x

3rd piece = 4x

So, you have

x+3x+4x = 16

8x = 16

x=2

first piece x=2 inches

second piece 3x=3(2)=6 inches

third piece 4x=4(2)=8 inches