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3244 - 1756 = 1488
1488 : 12 = 124
124 + 439 = 563
4 x 124 = 496
496 + 563 = 1059
Spr. 563 x 4 = 2252
8 x 124 = 992
2252 + 992 = 3244
k-krzesła
4s+8k=3244
s=k+439
4(k+439)+8k=3244
4k+1756+8k=3244/-1756
12k=1488/:12
k=124
s=124+439
s=563
s+4k=563+4x124=563+496=1059
Odp.:Za stół i 4 krzesła trzeba zapłacić 1059 zł.