Question

Select the equation that most accurately depicts the word problem.

Jim weighs 30 pounds less than Tom, and together they weigh 210 pounds. Let n = Tom's weight in pounds.

Answer 1

Answer:

If n=Tom's weight and j=Jim's weight

If we add 30 pounds to weight of Jim it will be equal to weight of Tom.

j+30=n

Now together they weigh 210 pounds.

So j+n=210

Step-by-step explanation:

Answer 2

Answer:

2n - 30 = 210

Step-by-step explanation:

Let n = Tom's weight in pounds

=> Jim's weight in pounds = n - 30 ...{30 pounds less than Tom}

Together, they weigh 210 pounds:

=> n + (n - 30) = 210

=> 2n - 30 = 210

This equation can be solved to get "n"

2n - 30 = 210

=> 2n = 210 + 30

=> 2n = 240

=> n = 120

Tom's weight in pounds = n = 120

Jim's weight in pounds = (n-30) = (120-30) = 90

Verify:

Jim weighs 30 pounds less than Tom (90 is 30 less than 120)

Together they weigh 210 pounds (120+90 = 210)