Question

[(64×33×2:4-500×2):2+5×a]-6×12+999:9=112
Află pe a
Dau coroană

Answer 1

[ ( 64 × 33 × 2 : 4 - 500 × 2 ) : 2 + 5 × a ] - 6 × 12 + 999 : 9 = 112

[ ( 2112 × 2 : 4 - 1000 ) : 2 + 5 × a ] - 72 + 111 = 112

[ ( 4224 : 4 - 1000 ) : 2 + 5 × a ] - 72 + 111 = 112

[ ( 1056 - 1000 ) : 2 + 5 × a ] - 72 + 111 = 112

( 56 : 2 + 5 × a ) - 72 + 111 = 112

( 28 + 5 × a ) - 72 + 111 = 112

( 28 + 5 × a ) - 72 = 112 - 111

( 28 + 5 × a ) - 72 = 1

28 + 5 × a = 1 + 72

28 + 5 × a = 73

5 × a = 73 - 28

5 × a = 45

a = 45 : 5

a = 9

Answer 2

Răspuns

Explicație pas cu pas:

[(64 × 33 × 2 : 4 - 500 × 2) : 2 + 5 × a ] - 6 × 12 + 999 : 9 = 112

[ ( 2 112 × 2 : 4 - 1 000 ) : 2 + 5 × a] - 72 + 111 = 112

[ ( 4 224 : 4 - 1 000 ) : 2 + 5 × a ] = 112 - 111 + 72

( 1 056 - 1 000 ) : 2 + 5 × a = 1 + 72

56 : 2 + 5 × a = 73

28 + 5 × a = 73

5 × a = 73 - 28

5 × a = 45

a = 45 : 5

a = 9 → numarul, aflat prin metoda mersului invers