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Daca 12a +15b=303 calc 4a+5b si 1010:(8a+10b)


Răspuns :

12a +15b = 303
3×(4a + 5b) = 303
4a+5b = 303 : 3 = 101

1010:(8a+10b) =
= 1010 : 2×(4a+5b) =
= 1010 : 2 × 101 =
= 505 ×101 =
= 51 005