CPM Homework Help : ACC7 Problem 7-13

Copy and rewrite the following expressions by combining like terms, making zeros, and using the Distributive Property. Visualizing the expressions by using algebra tiles may be helpful.

$(-3)+4x+2+2x+2x$
Step 1 (a):
Group like terms together.
$(4x+2x+2x)+(-3+2)$
Step 2 (a):
Simplify.
Answer (a):
$8x-1$

$-8x+4+(-3)$
Hint (b):
Visualize eight negative $x$ algebra tiles. What happens when you add $4$ unit tiles but then take $3$ of these unit tiles away?
Answer (b):
$-8x+1$

$7x^2+3x+4+7x^2+3x+4$
Hint (c):
See part (a).

$5(x-4)$
Hint (d):
Refer to the Math Notes.