Question

What is the value of x​

Answer 1

Answer:

$x = 70$

Step-by-step explanation:

$x = 180 - (30 + 80)$

$x = 180 - 110$

$x = 70$

to be sure

$70 + 80 + 30 { = }^{?} 180$

$100 + 80 { = }^{?} 180$

$180 = 180$

Answer 2

Answer:

70°

Step-by-step explanation:

All triangles' angles are added up to 180°

30 + 80 + x = 180

110 + x = 180

x = 180 - 110

x = 70