Question

AFLĂ VALOAREA NECUNOSCUTEI ​

Answer 1

b) { ( a - 416 : 4 + 2 ) × 5 + 3 } × 2 = 1986

{ ( a - 104 + 2 ) × 5 + 3 } × 2 = 1986

( a - 104 + 2 ) × 5 + 3 = 1986 : 2

( a - 104 + 2 ) × 5 + 3 = 993

( a - 104 + 2 ) × 5 = 993 - 3

( a - 104 + 2 ) × 5 = 990

a - 104 + 2 = 990 : 5

a - 104 + 2 = 198

a - 104 = 198 - 2

a - 104 = 196

a = 196 + 104

a = 300

c) { ( a - 1 ) : 100 + 90 } : 10 - 10 = 0

{ ( a - 1 ) : 100 + 90 } : 10 = 0 + 10

{ ( a - 1 ) : 100 + 90 } : 10 = 10

( a - 1 ) : 100 + 90 = 10 × 10

( a - 1 ) : 100 + 90 = 100

( a - 1 ) : 100 = 100 - 90

( a - 1 ) : 100 = 10

a - 1 = 10 × 100

a - 1 = 1000

a = 1000 + 1

a = 1001