Answer:
9
Step-by-step explanation:
If you add 9 to both sides, you will isolate the 'x' term.
hope this helps :)
Subtract 6 from both sides, you get 1/3x=-14
Now multiply both sides by there, hence x=-42
Step-by-step explanation:
p = 2×(l+w)
=> l = 3w
p = 2×(3w+w)
320 = 2× 4w
320 = 8w
=> w = 320/8 = 40
l = 3×40 = 120
so,
The width = b. ) 40 ft
The length = d.) 120 ft
