3 years ago

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

Mathematics

1 answer:

hjlf3 years ago

3 0

Answer:

rs=17

Step-by-step 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

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