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b+(5×5)=63:9+ 4×7 afla termenul necunoscut

Răspuns :

B+(5×5)=63:9+ 4×7
B+25=7+28
B+25=35
B=35-25
B=10
B+(5x5)=63:9+4x7 B+25=7+28 B+25=35 B=35-25 B=10 R=10