Răspunsuri

2014-06-11T14:35:02+03:00
2 * a + b : 2 = 643
a = b - 66
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2 * ( b - 66 ) + b : 2 = 643
2 * 2 * ( b - 66 ) + b = 2 * 643
4 * b + b = 2 * 643 + 4 * 66
5 * b = 1286 + 264 = 1550
b = 1550 : 5 = 310