y:27=107
y=27×107
y=2889
2889:27=107
170:x=5
x=170:5
x=34
170:34=5
y-157=388
y=388+157
y=545
545-157=388
2041-y=789
y=2041-789
y=1252
2041-1252=789
y:27=107
y=27×107
y=2889
2889:27=107
170:x=5
x=170:5
x=34
170:34=5
y-157=388
y=388+157
y=545
545-157=388
2041-y=789
y=2041-789
y=1252
2041-1252=789