63 : [ 39 - 2(2x+1)2] +43 = 67
63 : [ 39 - 2(2x+1)2] +64 = 67
63: [ 39 - 2(2x+1)2] = 67 - 64
63: [ 39 - 2(2x+1)2] = 3
39 - 2(2x+1)2 = 63 : 3
39 - 2(2x+1)2 = 21
2(2x+1)2 = 39 - 21
2(2x+1)2 = 18
(2x+1)2 = 18 : 2
(2x+1)2 = 9
(2x+1)2 = 32
2x+1 = 3
2x = 3 - 1
2x = 2
x = 2 : 2
x = 1
63 : [39 - 2(2x+1)2] + 43 = 67
63 : [39 - 2(2x+1)2] + 64 = 67
63 : [39 - 2(2x+1)2] = 67 - 64
63 : [39 - 2(2x+1)2] = 3
39 - 2(2x+1)2 = 63 : 3
39 - 2(2x+1)2 = 21
2(2x+1)2 = 39 - 21
2(2x+1)2 = 18
(2x+1)2 = 18 : 2
(2x+1)2 = 9
(2x+1)2 = 32
2x+1 = 3
2x = 3 - 1
2x = 2
x = 2 : 2
x = 1
