Question

A number is first increased by 20 and then doubled. The result is 2 less than 5 times the number.

Answer 1

The number is 14

Explanation:

Let n be the number. We can set up an equation:

2(n+20)=5n-2

Distribute the left side

2n+40=5n-2

Move like terms to one side. Note that the sign flips when we move a term from one side to the other.

40+2=5n-2n

42=3n

Divide both sides by 3

n=14