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x+59 - tom I
x+170 - tom II
x+x+59+x+170=625
3x+229=625
3x=625-229
3x=396 /:3
x=132
132+59=191
132+170=202
Odp. I tom ma 191 str, tom II 202, a tom III 132str.
I tom ma o 59stron wiecej niż III
II tom 170stron więcej niż III
170+59=229 str
625-229=396
229+396=625
x+59-tom 1
x+170-tom2
ROWNANIE
3x+229=625//-229
3x=396
x=132-tom 3
132+59=191-tom1
132+170=302-tom2
SPRAWDZENIE:
132+191+302=625
:)
Ps.napewno dobrze:P