Question

2[18-4(3x-9)]-9=[19-5(2x-3)]-21

Answer 1

Răspuns:

Explicație pas cu pas:

2[18-4(3x-9)]-9=[19-5(2x-3)]-21

2(18 - 12x + 36) - 9 = (19 - 10x + 15) - 21

36 - 24x + 72 - 9 = 19 - 10x + 15 - 21

36 + 72 - 9 - 19 - 15 + 21 = 24x - 10x

86 = 14x

x = 86/14 = 43/7