Question

The difference between negative three times a number and eight is 7.

Answer 1

b

Explanation:

let the number be x then negative three times the number is - 3x

the difference (subtraction) between - 3x and 8 is - 3x - 8

equate this expression to 7

- 3x - 8 = 7 ( add 8 to both sides )

- 3x - 8 + 8 = 7 + 8 ( simplify both sides )

- 3x = 15 ( divide both sides by - 3 )

`(-3)/(-3)` x =
`(15)/(-3)` , that is

x = - 5