Answer:
1. -19x
2. 8x-7
3. -18x+2y
Explanation:
3. 23 - 8x
5. -18x + 2y
first: 3x - x = 2x
2x - 22x = -20x
-20x + x = -19x
second one:
8 - (-15) = 23
12x - 20x = -8 x
23 - 8x
third:
-10x - 8x = -18x
3y - y = 2y
-18x + 2y
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