Question

pls tell fast...
I will mark you brainlest​

Answer 1

As we know,

sum of all angle of triangle=180

so,

5x-60+2x+40+3x-80=180

10x-100=180

10x=180+100

x=280/10

x=28

Answer 2

Answer:

$we \: know \: that \\ sum \: of \: all \: angle \: in \: { \triangle} \: = {180 \degree} \\ then \\ (5x - 60 {}^{o} ) + (2x + 40{ \degree} )+ (3x - 80 {}^{o} ) = 180 \\ = > 10x - 100{ \degree} = 180 \\ = > 10x = 280 \\ = > x = 28$