ANSWER
[tex]x = 4[/tex]
[tex]y = 2[/tex]
EXPLANATION.
For the top triangle, the third angle
[tex] = 180 - 148 - 18 = 14 \degree[/tex]
Since the two triangles are congruent, the corresponding angles are equal.
This implies that,
[tex]3x + y = 14 - - - (1)[/tex]
and
[tex]5x - y = 18 - - - (2)[/tex]
If we add the two equations, we obtain,
[tex]8x = 32[/tex]
We divide both sides by 8 to get,
[tex]x = 4[/tex]
We put this value in to equation 1 to get,
[tex]3(4) + y = 14[/tex]
This implies that,
[tex]12 + y = 14[/tex]
[tex]y = 14 - 12 = 2[/tex]
