Answer:
x=3
Step-by-step explanation:
RS=23-2x
ST=9x-5
RT=39
RS=x
RS+ST=RT
23-2x+9x-5=39
9x-2x+23-5=39
7x+18=39
7x=39-18
7x=21
x=21/7=3
so RS=3
hope this is helps u
I'm pretty sure it's 17 units
I got u
