👤

70-[4×(5+c×7)-2]:3=8



REPEDEEE


Răspuns :

70 - [ 4 × ( 5 + c × 7 ) - 2 ] : 3 = 8

[ 4 × ( 5 + c × 7 ) - 2 ] : 3 = 70 - 8

[ 4 × ( 5 + c × 7 ) - 2 ] : 3 = 62

4 × ( 5 + c × 7 ) - 2 = 62 × 3

4 × ( 5 + c × 7 ) - 2 = 186

4 × ( 5 + c × 7 ) = 186 + 2

5 + c × 7 = 188 : 4

5 + c × 7 = 47

c × 7 = 47 - 5

c × 7 = 42

c = 42 : 7

c = 6 → numarul, aflat prin metoda mersului invers