Question

Folosind metoda mersului invers aflati numarul natural x din egalitatea: [(x-8):2^2+3)]*2=22

Answer 1

Răspuns:   x = 40

Explicație pas cu pas:

[ ( x - 8 ) : 2² + 3 ] × 2 = 22

( x - 8 ) : 4 + 3 = 22 : 2

( x - 8 ) : 4 = 11 - 3

( x - 8 ) : 4 = 8

x - 8 = 8 × 4

x - 8 = 32

x = 32 + 8

x = 40 → numarul

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Verific:

[ ( 40 - 8 ) : 4 + 3 ] × 2 = 22

= ( 32 : 4 + 3 ) × 2 =

= 11 × 2 =

= 22

Answer 2

[ ( x - 8 ) : 2 ^ 2 + 3 ) ] × 2 = 22

[ ( x - 8 ) : 4 + 3 ) ] × 2 = 22

( x - 8 ) : 4 + 3 = 22 : 2

( x - 8 ) : 4 + 3 = 11

( x - 8 ) : 4 = 11 - 3

( x - 8 ) : 4 = 8

x - 8 = 8 × 4

x - 8 = 32

x = 32 + 8

x = 40