Question

help me solve this i dont kow how to do this i was absent in class when my teaacher taught this doont send video just answer

Answer 1

8:-

`\\ \sf \longmapsto 5x+20=40`

`\\ \sf \longmapsto 5x=40-20`

`\\ \sf \longmapsto 5x=20`

`\\ \sf \longmapsto x=(20)/(5)`

`\\ \sf \longmapsto x=4`

9:-

As its a isosceles triangle

• x=y

`\\ \sf \longmapsto x+y+60=180`

`\\ \sf \longmapsto 2x+60=180`

`\\ \sf \longmapsto 2x=120`

`\\ \sf \longmapsto x=y=60`

and

`\\ \sf \longmapsto z=x+60÷60+60=120`