ninac2
Answered

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

Sagot :

jacobsvictoria01

Answer:

8r+20=10r

20=2r

10=r

Hope this helped

Answer:

[tex]\boxed{\sf r=10}[/tex]

Step-by-step explanation:

[tex]\sf 4(2r+5)=10r[/tex]

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

[tex]\longmapsto\sf 8r+20=10r[/tex]

Subtract 20 from both sides:

[tex]\longmapsto\sf 8r+20-20=10r-20[/tex]

[tex]\longmapsto\sf 8r=10r-20[/tex]

Subtract 10r from both sides:

[tex]\longmapsto\sf 8r-10r=10r-20-10r[/tex]

[tex]\longmapsto\sf -2r=-20[/tex]

Divide both sides by -2:

[tex]\longmapsto\sf \cfrac{-2r}{-2}=\cfrac{-20}{-2}[/tex]

[tex]\longmapsto\sf r=10[/tex]

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