Question

the total weight of 3 tables is 16.9 pounds. the first table is twice as heavy as the second table. The weight of the third table is 1/3 the weight of the second table. What is the weight of the first table?

Answer 1

2x + x + 1/3x =16.9
31/3x=16.9

x = 5

the first table is 10 pounds