Respuesta :

5y + 7 = 52
5y = 52 - 7
5y = 45
y = 9

[tex] \frac{40}{60} [/tex] = [tex] \frac{x+12}{42} [/tex] 

[tex] \frac{2}{3} [/tex] = [tex] \frac{x+12}{42} [/tex] 

3(x+12) = 2 x 42
3x + 36 = 84
3x = 84 - 36
3x = 48
x = 16

Angle H = 180 - 52 - 36 = 92