I NEED HELP please! I literally don’t understand

Answer:
length = 7 in
width = 42 in
Step-by-step explanation:
length = x
width = 6x
perimeter = 98 in
[tex]2(x) + 2(6x) = 98 \\ 2x + 12x = 98 \\ 14x = 98 \\ x = \frac{98}{14} \\ x = 7[/tex]
length = x = 7 in
width = 6x = 6(7) = 42 in