{12ad + 1300 = 3620908
{13a + 142 = 12b
{(6bd/3) + 34 = 4222910
{12ad = 3620908 - 1300
{12b - 13a = 142
{2bd = 4222910 - 34
{ a = 3619608/12d
{ 12b - 13a =142
{ b = 4222876/2d
{a = 301634/d
{12b - 13a = 142
{b = 2111438/d
12 * (2111438/d ) - 13 * (301634/d) = 142 |*d
25337256 - 3921242 = 142d
21416014 = 142d
d= 21416014/142
d=150817
a = 301634/150817
a= 2
b=2111438/150817
b= 14