Question

if the sum of a number and nine is tripled, the result is one less than twice the number. find the number

Answer 1

You're given two sides of an equation: "the sum of a number and nine is tripled" and "one less than twice the number".
Let "the number" be x. What are the two sides of the equation now?

Answer 2

\[2x-3(x+9)=1\rightarrow2x-3x-27=1\rightarrow-x=28rightarrowx=-28\]

Answer 3

3(x+9)=2x-1