Question

b. noah has 4 books of poetry. his sister gives him some more books. now he has 10 books of poetry. how many books did his sister give him? show your thinking using drawings, numbers, or words. equation: ________

Explanation:

Step1: Define unknown variable

Let $x$ = number of books sister gave.

Step2: Set up equation

$4 + x = 10$

Step3: Solve for $x$

$x = 10 - 4$
$x = 6$

Answer:

6
Equation: $4 + x = 10$ (where $x=6$)