Answer:
Step-by-step explanation:
The answer is 18794.86549
rs=17
rs+st=rt
23-2x+9x-5=39
simplify
7x+18=39
solve for x
7x=21
7x/7=21/7
x=3
substitute x into ther rs equation
rs=23-2(3)
Answer: All real numbers except 3