Final answer:
To translate the sentence into an equation, assign a variable to Helena's height and set up the equation as h - 17 = 49. Solve for h by adding 17 to both sides of the equation.
Step-by-step explanation:
To translate the sentence into an equation, we need to assign a variable to Helena's height. Let's use the variable h. The equation can be written as: h - 17 = 49.
To solve for h, we add 17 to both sides of the equation to isolate h, resulting in h = 66. So, Helena's height is 66.