Question

{[(2x-4)•8+6]:6+8}•10-21=89

Answer 1

{[(2x-4)•8+6]:6+8}•10-21=89
{[(2x-4)•8+6]:6+8}•10 = 89 + 21
{[(2x-4)•8+6]:6+8}•10 = 110
[(2x-4)•8+6]:6+8 = 110 : 10
[(2x-4)•8+6]:6+8 = 11
[(2x-4)•8+6]:6 = 11 - 8
[(2x-4)•8+6]:6 = 3
(2x-4)•8+6 = 3 × 6
(2x-4)•8+6 = 18
(2x-4)•8 = 18 -6
(2x-4)•8 = 12
2x-4 = 12:8
2x-4 = 1,5
2x = 1,5+4
2x = 5,5
x = 5,5:2
x = 2,75