Question

If the sum of a number and eight is doubled the result is five less than the number find the number

Answer 1

Answer: -21

Explanation:

Let the number be x.

Then, this means 2(x+8)+5=x.

• 2x+16+5=x [distributive property]
• 2x+21=x [combine like terms]
• x+21=0 [subtract x from both sides]
• x= - 21 [subtract 21 from both sides]