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Calculeaza valorile numerice ale literelor. 145-127+(7 • a) =81
63:b+125-118=16


Răspuns :

145-127+(7 • a) =81
18+(7 • a) =81
(7 • a) =81-18
7 • a =63
a=63:7
a=9

63:b+125-118=16
63:b+7=16
63:b=16 -7
63:b=9
b=63:9
b=7