5647-y=70*6
у=5647-420=5227
и
x-678=784:7
х=112+678=790
5647-y=420
y=5647-420
y=5227
x-678=112
x=678+112
x=790
5647-y=70*6
у=5647-420=5227
и
x-678=784:7
х=112+678=790
5647-y=420
y=5647-420
y=5227
x-678=112
x=678+112
x=790