Răspuns :
575-b×32-45=50
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c
c-45=50
c=95
575 -b×32=95
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d
575-d=95
d=480
b×32=480
b=15
--------------
c
c-45=50
c=95
575 -b×32=95
-------
d
575-d=95
d=480
b×32=480
b=15