1600 - 65x=1215+45x
-65х-45х=1215-1600
-110х=-385
х=-385:-110
х=3,5
-45х-65х=1215-1600
х=-385/-110=3,5
1600 - 65x=1215+45x
-65х-45х=1215-1600
-110х=-385
х=-385:-110
х=3,5
1600 - 65x=1215+45x
-45х-65х=1215-1600
-110х=-385
х=-385/-110=3,5