Can anyone solve these equations

7x + 13(3/14x + 3) = 91 for x
and
3/14x + 3 = -7/13x + 7

1).
7x + 13(3/14x + 3) = 91
7x + 39/14x + 39 = 91
9 11/14x = 52
x = 52 x 14/137
= 728/137
= 5 43/137
= 5.3138686

2).
3/14x + 3 = -7/13x + 7
3/14x + 7/13x = 4
137/182x = 4
x = 4 x 182/137
= 728/137
= 5 43/137
= 5.3138686