Un edificio proyecta una sombra de 25 metros y del punto más alto de este al punto final de la sombra hay una distancia de 53 m ¿cuál es la altura del edificio?

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong

Math it's appreciated. (picture provided)

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given