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belka [17]
3 years ago
15

Question 10 is attached! Thanks for all your help!!!!!

Mathematics
2 answers:
KonstantinChe [14]3 years ago
6 0
8r + 2r - 7r = 18
10r - 7r = 18
3r = 18
r = 18/3
r = 6
fgiga [73]3 years ago
6 0
Good morning! ~

r = 6 

And this is why;

First, when we have our equation, were going to simplify. 

So we have 

8r + 2r - 7r = 18

Combining like terms;

(8r + 2r - 7r) = 18

3r = 18

Now we are going to divide each side of our equation by 3 

3r/3 = 18/3

r=6 

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