**Answer:**

1 1/2 + (-1/2) is also 1 1/2 - 1/2.

the result is 1 whole, and 1 whole is also the difference between 1 1/2 and 1/2.

Say you have half of a cheese piece, but your friend has 1 whole cheese piece plus half of a cheese piece.

He/She has 1 more cheese piece than you, right? That's the difference between you and your friend's cheese. **1 whole.**

12 is your answer. you're welcome

30+.4+.02+.005 is your answer

replace the numbers given for x & y so

the equation becomes 3*(-3) + 2*(-4) =

3*-3 = -9

2*-4 = -8

-9 + -8 = -17