Answer:
Step-by-step explanation:
1) 5xy - xy + 2x - 13x + 10xy - 8x = 5xy - xy + 10xy +2x - 13x - 8x
Combine like terms
= (5 -1 +10)xy + (2-13-8)x
= 14xy + (-19x)
= 14xy - 19x
2) -6c - (-6c) - (+6c) = -6c + 6c - 6c
= (- 6 + 6 - 6)c
= -6c
3) 0x - 22x - 4(2x) = 0x - 22x - 8x = -30x
