Respuesta :

m<DAC + m<CAB = 90
4x + 8 + 5x - 8 = 90
9x = 90
x = 90/9
x=10
Triangle DAC and CAB are both equal. So lets make the equation.

4x + 8 = 5x - 8 

Do the math, Add 8 to both sides

4x +8 +8 = 5x - 8 + 8 

4x + 16 = 5x 

Subtract 4x from both sides

4x - 4x + 16 = 5x - 4x

16 = x or x = 16