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A) (56:a+16):5+12=16

B) [(a+7):6-10]:4+5=25


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Răspuns :

Rapunzel15
A) (56:a+16):5+12=16
(56:a+16):5 = 16-12
(56:a+16):5 = 4
(56:a+16) = 4×5
56:a+16 = 20
56:a = 20-16
56:a = 4
a = 56:4
a = 14

B) [(a+7):6-10]:4+5=25
[(a+7):6-10]:4 = 25-5
[(a+7):6-10]:4 = 20
(a+7):6-10 = 20×4
(a+7):6-10 = 80
(a+7):6 = 80+10
(a+7):6 = 90
a+7 = 90×6
a+7 = 540
a = 540-7
a = 533

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