Answer:
I guess divide both side by l because to find w we have to eliminate l first......
Change 0.7 to 7/10 and 4 to 1/4,so it'll be 7/10x1/4, then find least common denominator, 40.change fractions to 28/40x10/40=280/40=70
Answer: A
Step-by-step explanation:

There is 2000 pounds in 1 ton
Divide 4000 lbs with 2000 lbs
4000/2000 = 2
2 tons is your answer
hope this helps
the answer to this question is b