Question

a. 21+ _ = 0
b. (-5)× _ = 1
c. _ ÷12= 0
d. 12+[(-8+5]= [12+ _]+5
e. [(-3×2] + [(-3) ×7] =(-3) ×(2+ _)
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Answer 1

Answer:

1) -21

2) 1/-5

3) 0

4) -8

5) 7