3 years ago

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:

Step-by-step explanation:

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