If a+ab+abc+abcd=1992, find the value of a, b, c, and d?
1 answer:
Well
one possible thing is if
a=1992
and if b or c or d =0
examples
a=1992
b=0
c=0
d=0
another is if a=b=c=1
and d=1989
there are many possibilities
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Answer:
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