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daca a + b =12, aflati a si b, stiind ca: 72 - [21 - (75 - 56 x b : a - 23) : 4 + 7] = 50
(Va rog dau coronita)


Răspuns :

72-[21-(75-56*b:a-23):4+7]=50
-[21-(75-56b:a-23):4+7]=50-72
-21+(75-56x-23):4-7=-22
(75-56x-23):4=-22+21+7
-56x+52=6*4
-56x=24-52
-56x=--28
x=28/56
x=2
b:a=2
a+b=12
b:a=2
a+2a=12
3a=12
a=12:3
a=4
b=2a
b=2*4
b=8