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13 votes
13 votes
If rs=23-2x,st=9x-5,and rt=39 what is rs

User Karthikeyan KR
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2.9k points

1 Answer

13 votes
13 votes

Answer:

rs=17

Explanation:

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)

rs=17

User Rijvi Rajib
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3.2k points