Question

Calcule o valor de x

4x/5 + 8° + 2x + 12° = 90°

Answer 1

4x/5+8°+2x+12°=90°
4x/5+2x=90°-20°      (tirando minimo e subtraindo)
4x/5+10x/5=70°
14x/5=70°
14x=5 . 70°
14x= 350°        (simplificandoo)
7x=175°
x=25°