Explanation:
Q23
Answer -12
-3(-12)-6=30
36-6=30
30=30
Q22
answer w= -2/9
-2/9 + 6/9 or 2/3 = 4/9
w+ 6/9 = 4/9
-2+6/9 = 4/9
Q21
answer = 21
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