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ma puteti ajuta ??? PLEASEE !!!!
a , b = ??
a + b = 497
3 x a + 7 x b = 2791
( ,,x,, inseamna inmultire )


Răspuns :


a+b=497

a=497-b

3*(497-b)+7*b=2791

1491-3*b+7*b=2791

7*b-3*b=2791-1491

4*b=1300

b=1300:4  deci b=325

a+325=497

a=497-325 deci a=172