0.25r - 0.125 + 0.5r = 0.5 + r

8doors on the second floor

the 4th choice is the correct one

step-by-step explanation:

0.25r - 0.125 + 0.5r = 0.5 + r

Step 1) Put all of the like terms together, our like terms in this equation are, 0.25r and 0.5r

0.25r + 0.5r = 0.75r

now our equation looks like, -0.125 + 0.75r = 0.5 + r

Step 2) Get all the r's to one side, so well subtract 0.75r from r which equals, 0.25r

now our equation looks like, -0.125 = 0.5 + 0.25r

Step 3) isolate the r, to do this we'll subtract the 0.5 from both sides and out equation will look like, −0.625 = 0.25r

Step 4) Divide both sides by 0.25 to get r by itself, our final equation looks like this, −2.5 = r

r = -2.5

Step-by-step explanation:

Simplify.

Switch r with -0.125.

Send -0.25 to the other side.

r = -2.5

Hope this helped!

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