Question

Translate this word phrase into a variable expression. 25 decreased by the sum of 6 and a number

Answer 1

6x-25 six and a number(x) decreased by 25

Answer 2

Easy, 

just go slowly

25 decreased

25-

by the SUM of 6 and a number

(6+x)

25-(6+x)

This is your equation. 25-(6+x)