а) 7х-51=4х,7х-4х=51,3х=51,х=17 б)6р+102=23р,102=23р-6р,102=17р,р=6 в)8а+3а=4466,11а=4466,а=406 г)25с-5с=6060,20с=6060,с=303
а) 7х-51=4х,7х-4х=51,3х=51,х=17 б)6р+102=23р,102=23р-6р,102=17р,р=6 в)8а+3а=4466,11а=4466,а=406 г)25с-5с=6060,20с=6060,с=303