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Over [174]
2 years ago
13

What is the answer to 4(2r+5)=10r

Mathematics
2 answers:
maxonik [38]2 years ago
8 0

Answer:

8r+20=10r

20=2r

10=r

Hope this helped

vladimir2022 [97]2 years ago
4 0

Answer:

\boxed{\sf r=10}

<h3><u>Step-by-step explanation:</u></h3>

\sf 4(2r+5)=10r

Expand: Use the Distributive Property to multiply 4 by 2r+5:

\longmapsto\sf 8r+20=10r

Subtract 20 from both sides:

\longmapsto\sf 8r+20-20=10r-20

\longmapsto\sf 8r=10r-20

Subtract 10r from both sides:

\longmapsto\sf 8r-10r=10r-20-10r

\longmapsto\sf -2r=-20

Divide both sides by -2:

\longmapsto\sf \cfrac{-2r}{-2}=\cfrac{-20}{-2}

\longmapsto\sf r=10

______________________________________

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