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gizmo_the_mogwai [7]
3 years ago
10

7r - 1 = 2r + 9 last one for now thank you guys so much for helping me!

Mathematics
2 answers:
Margarita [4]3 years ago
7 0

Answer:

r=2

Step-by-step explanation:

7r - 1 = 2r + 9

Add 1 to both sides:

7r-1+1=2r+9+1

7r=2r+10

Subtract 2r from both sides:

7r-2r=2r+10-2r

5r=10

Divide both sides by 5:

\frac{5r}{5}=\frac{10}{5}

r=2

Alla [95]3 years ago
6 0

Answer:

2

Step-by-step explanation:

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