Answer:
Step-by-step explanation:
2x = x+30
subtract x on both sides
x = 30
As it is a isosceles triangle opposite sides are equal.
[tex]\\ \sf\longmapsto 2x=x+30[/tex]
[tex]\\ \sf\longmapsto 2x-x=30[/tex]
[tex]\\ \sf\longmapsto (2-1)x=30[/tex]
[tex]\\ \sf\longmapsto x=30[/tex]
