Answer :
Answer:
[tex]rs=17\ units[/tex]
Step-by-step explanation:
we know that
[tex]rt=rs+st[/tex]
we have
[tex]rt=39\ units[/tex]
[tex]rs=(23-2x)\ units[/tex]
[tex]st=(9x-5)\ units[/tex]
substitute the given values and solve for x
[tex]39=(23-2x)+(9x-5)[/tex]
[tex]39=(7x+18)[/tex]
[tex]7x=39-18[/tex]
[tex]7x=21[/tex]
[tex]x=3[/tex]
Find the value of rs
substitute the value of x
[tex]rs=23-2(3)=17\ units[/tex]