Question

find the value of x ​

Answer 1

80°

Because the some of all angles of triangle is 180° .so ........ 180° - (subtracted ) measure of B + measure of C..

But just confirm that

....the measure of C = 40 then your ans is 80 ° .

But you have not written properly ..so if it is 50° .......then it must be 70°

Answer 2

Answer:

$\huge{80°}$

Step-by-step explanation:

$See, \: we \: know \: that \: all \: the \: sum \: of \: the \: angles \: in \: a \: triangle \: is \: 180°. \\ \\So, 60°+40°+x=180°\\ = > x = 180 - 100\\ = > x = 80°$