How Does Temperature Affect Copper Wire Resistivity?

[Pao44445]

Homework Statement

Initially, copper wire is 20^oC then raises the temperature of the wire casing the resistivity up 12%, find the temperature at the final.

Homework Equations

R=R_ref[1+α(T-T_ref)]

The Attempt at a Solution

I am completely confused with this mathematics problem,Stucking with the final resistivity ( R ) in the equation

 

[mfb]

If the initial resistance is 10 Ohm, what is the final resistance?
If the initial resistance is R₀, what is the final resistance?