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cum fac 900-7x31-40=7x(m+32)-64

Răspuns :

900-7x31-40=7x(m+32)-64
900-217-40=7x(m+32)-64
683-40=7x(m+32)-64
643=7x(m+32)-64
643+64=7x(m+32)
707=7x(m+32)
707:7=m+32
101=m+32
101-32=m
69=m