Question

find the value of x​

Answer 1

$answer \\ \\ solution \\ \\ sum \: of \: all \: sides \: of \: a \: quadrilateral \: is \: {360}^{0} \\ \\ then \: 105+ 100 + 130 + x = 360 \\ \\ 335 + x = 360 \\ \\ x = 360 - 335 \\ \\ x = 25 \\ \\ then \: x = {25}^{0}$

Answer 2

we know that, the sum of exterior angles of a quadrilateral is 360.

so, 100+130+105+x=360

=>335+x=360

=>x=360-335

=>x=25