Question

[(□-416÷4+2)×5+3]×2=1986
Dau coroana !!Vaa rogg !!

Answer 1

Răspuns:

Explicație pas cu pas:

[(□ - 416 : 4 + 2) × 5 + 3 ] × 2 = 1 986

(□ - 104 + 2) × 5 + 3 = 1 986 : 2

(□ - 104 + 2) × 5 + 3 = 993

(□ - 104 + 2) × 5 = 993 - 3

(□ - 104 + 2) × 5 = 990

□ - 104 + 2 = 990 : 5

□ - 104 + 2 = 198

□ = 198 - 2 + 104 -> aplic metoda mersului invers

□ = 196 + 104

□ = 300 ->  numarul necunoscut

Verific:

[ ( 300 - 104 + 2 ) × 5 + 3 ] × 2 = 1 986

= [ ( 196 + 2 ) × 5 + 3 ] × 2 =

= ( 198 × 5 + 3 )× 2 =

= 993 × 2 =

= 1986