Question

208:[112-(100-3×a)×4:23]=2
VA ROG DAU COROANA SI MA SI ABONEZ!!!!​

Answer 1

Te salut, Alin Gabriel!

Răspuns:  a = 18

Explicație pas cu pas:

208 : [112 - (100 - 3 × a ) × 4 : 23] = 2

112 - (100 - 3 × a ) × 4 : 23 = 208 : 2

112 - (100 - 3 × a ) × 4 : 23 = 104

(100 - 3 × a ) × 4 : 23 = 112 - 104

(100 - 3 × a ) × 4 : 23 = 8

(100 - 3 × a ) × 4 = 8 × 23

(100 - 3 × a ) × 4 = 184

100 - 3 × a = 184 : 4

100 - 3 × a = 46

3 × a = 100 - 46

3 × a = 54

a = 54 : 3

a = 18 → numărul, aflat prin metoda mersului invers

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Verific:

208 : [112 - (100 - 3 × 18) × 4 : 23] = 2

= 208 : [112 - (100 - 54) × 4 : 23] =

= 208 : ( 112 - 46 × 4 : 23) =

= 208 : ( 112 - 184 : 23 ) =

= 208 : ( 112 - 8) =

= 208 : 104 =

= 2