Question

15+15 x[88-3 x(42-225 :15+a)-36:6]:5 =18

Answer 1

Răspuns:

Explicație pas cu pas:

15 + 15 × [ 88 - 3 × ( 42 - 225 : 15 + a ) - 36 : 6 ] : 5 = 18

15 × [ 88 - 3 × ( 42 - 15 + a ) - 6 ] : 5 = 18 - 15

15 × [ 88 - 3 × ( 27 + a ) - 6 ] : 5 = 3

15 × [ 88 - 3 × ( 27 + a ) - 6 ] = 3 × 5

15 × [ 88 - 3 × ( 27 + a ) - 6 ] = 15

88 - 3 × ( 27 + a ) - 6 = 15 : 15

88 - 3 × ( 27 + a ) - 6 = 1

88 - 3 × ( 27 + a ) = 1 + 6

88 - 3 × ( 27 + a ) = 7

3 × ( 27 + a ) = 88 - 7

3 × ( 27 + a ) = 81

27 + a = 81 : 3

27 + a = 27

a = 27 - 27

◇ a = 0