mn + mp = 147 si m = 7
m ( n + p ) = 147
7 × ( n + p ) = 147
n + p = 147 : 7
n + p = 21
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b) mn + mp = 265 si m = 5
m × ( n + p ) = 265
5 × ( n + p ) = 265
n + p = 265 : 5
n + p = 53
_______________________
c) mn + mp = 364 si m = 13
m × ( n + p ) = 364
13 × ( n + p ) = 364
n + p = 364 : 13
n + p = 28
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d) mn + mp = 405 si m = 15
m × ( n + p ) = 405
n + p = 405 : 15
n + p = 27