Given:
Point O is on line segment NP.
OP=10, NP=2x, and NO=x+7.
To find:
The numerical length of NO.
Solution:
If point O is on line segment NP, then by segment addition property, we get
![NP=NO+OP](https://img.qammunity.org/2021/formulas/mathematics/high-school/p2amf0p362h2x5ba7ouymu611wcwc6g5n6.png)
![2x=(x+7)+10](https://img.qammunity.org/2021/formulas/mathematics/high-school/1pnigxqhgmw8hvzz656fltz2f9li7y8xpd.png)
![2x=x+17](https://img.qammunity.org/2021/formulas/mathematics/high-school/8y5404uuxw6trw3wmdmv28z74phgry5ysz.png)
Subtract both sides by x.
![2x-x=17](https://img.qammunity.org/2021/formulas/mathematics/high-school/mn53jt8oju562y928hkfbvezgcrlvymlkl.png)
![x=17](https://img.qammunity.org/2021/formulas/mathematics/high-school/eeuxt6l0si8tlwhfs5taegyzwfexvl985u.png)
The value of x is 17.
Now,
![NO=x+7](https://img.qammunity.org/2021/formulas/mathematics/high-school/bgdi206d59czuwluebqu13dw3twoj39fwg.png)
![NO=17+7](https://img.qammunity.org/2021/formulas/mathematics/high-school/pm44wlbiqmrr2kikxy50k5xdgmj27duv0v.png)
![NO=24](https://img.qammunity.org/2021/formulas/mathematics/high-school/rzhoo67vy9tf5i9ayjazvplzt95rqz7vqm.png)
Therefore, the numerical length of NO is 24units.