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9y-7y = 11+7
2y = 18 /:2
y = 9
A więc to równanie spełnia liczba 9
9y-7=11+7y
l= 9x 7-7=56
p= 11+7x7=60
L=/P
8 ?
9y-7=11+7y
l= 9x8-7=65
p= 11+7x8=67
L=/P
9 ?
l= 9x9-7=74
p= 11+7x9= 74
l=p
Miałam to niedawno ;)
prosze o naj ; )