1. Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 36. How old is each sister? (a) Write an equation that represents the situation. Explain any variable used. (b) Solve the equation from Part (a). Show your work. State your solution as a sentence complete.
+36923 Let 'x' = sister's age...
then Kim's age = 2x
added together they equal 36 so: x + 2x = 36 solve for 'x'
3x=36 (divide both sides by 3)
x=sister's age = 12 Kim's age = 2x = 24
