The sum of two numbers is 40. The second number is 5 less than twice the first number. Let x represent the first number and let y represent the second number. What is the value of the first number? Use the table to guess and check. Numbers
x
y
x + y = 40
y = 2 x minus 5

15
20
25
30

15

Explanation:

x+2x-5=40

3x-5=40

3x=45

x=15

true

explanation:

voracity is the noun corresponding to the adjective voracious, which means (1) eager to consume a great amount of food, or (2) marked by an insatiable appetite. veracity is far more common than the rare voracity, so the latter is sometimes used in place of the former.