The first thing we will do in this case is define variables: x = Tim'S age We have then: "Tim's age in 7 years will be three times what it was 19 years ago" x + 7 = 3 * (x-19) rewriting the equation: x + 7 = 3x-57 Answer: An equation for the given sentence is: x + 7 = 3x-57
