Question

Amy and Stephanie were playing a number game. Amy picked a number and told Stephanie that if she added 9 to the number and multiplied the sum by 3, it would equal 12. Which equation could Stephanie use to find the number, x?

Answer 1

The equation for the statement is ( x + 9 ) × 3 = 12 , and the value of x is - 5 .

Explanation:

Given as :

Let The number picked by Amy = x

Amy told to Stephanie

she add 9 to the number and multiply the sum by 3 it would be 12

So, According to statement

( x + 9 ) × 3 = 12

Or, 3 x + ( 9×3 ) = 12

Or, 3 x + 27 = 12

or, 3 x = 12 - 27

or, 3 x = - 15

∴ x = -
`(15)/(3)`

I.e x = - 5

Hence The equation for the statement is ( x + 9 ) × 3 = 12 , and the value of x is - 5 . Answer