Răspuns:
Explicație pas cu pas:
3×8+1-{4+[15×(8-5x)+23]÷4}=4
24 + 1 - {4+[15×(8-5x)+23]÷4} = 4
25 - {4+[15×(8-5x)+23]÷4} = 4
4+[15×(8-5x)+23]÷4 = 25 - 4 = 21
[15×(8-5x)+23]÷4 = 21 - 4 = 17
15×(8-5x)+23 = 4 x 17 = 68
15×(8-5x) = 68 - 23 = 45
8 - 5x = 45 : 15 = 3
5x = 8 - 3 = 5
x = 5 : 5 = 1