Question

20:{[3x(x-6)+20]:8}+5=10

Answer 1

Răspuns:  x = 10

Explicație pas cu pas:

20 : {[3 ×( x - 6) + 20] : 8} + 5 = 10

20 : {[3 ×( x - 6) + 20] : 8} = 10 - 5

20 : {[3 ×( x - 6) + 20] : 8} = 5

[3 ×( x - 6) + 20] : 8 = 20 : 5

[3 ×( x - 6) + 20] : 8 = 4

[3 ×( x - 6) + 20] = 4×8

3 ×( x - 6) + 20 = 32

3 ×( x - 6) = 32 - 20

3 ×( x - 6) = 12

x - 6 = 12 : 3

x - 6 = 4

x = 4 + 6

x = 10 → numărul aflat prin metoda mersului invers