Question

Din produsul nr 4 si 72 am scazut catul nr 72 si 8. Am impartit aceasta diferenta la un nr (a), am adunat 35, iar suma obtinuta am inmultit-o cu 6, apoi, adunand 12, am obtinut 276. Afla nr a.

Answer 1

[(4×72-72:8):a+35]×6+12=276
[(288-9):a+35]×6+12=276
(279:a+35)×6+12=276
(279:a+35)×6=276-12
(279:a+35)×6=264
279:a+35=264:6
279:a+35=44
279:a=44-35
279:a=9
a=279:9
a=31