Question

preciso de ajudar nesses cálculos

Answer 1

70+x=180
x=180-70
x=110°

180 - x + x = 180
-x + x = 180 - 180
corta tudo e dá 0

12x + 10 + 5x = 180
12x+5x= -10
17x= -10
x= -10/17
x= -1/7

Answer 2

2$\sqrt{x}$