Question 921916

{{{WY}}} and {{{VZ}}} intersect at point {{{X}}} 
measure of angle {{{WXV=4s-9}}} 
measure of angle {{{ZXY=2s+17}}} 
Prove {{{s=13}}}

{{{WXV}}} and {{{ZXY}}} are {{{vertical}}}{{{ angles}}}, the angles opposite each other when two lines cross, and they are equal 

{{{WXV=ZXY}}} 

{{{4s-9=2s+17}}} 

{{{4s-2s-9=2s-2s+17}}} 

{{{2s-9=17}}} 

{{{2s-9+9=17+9}}} 

{{{2s=26}}} 

{{{s=26/2}}} 

{{{s=13}}}