My sister is 18 years old. My brother says that his age minus eighteen is equal to my sister's age. How old is my brother?
Enter an equation, using b as your variable, to find how old my brother is.
The equation is
My brother is
years old.

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Which is f(5) for the function –2x2 + 2x - 3?

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