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Wewaii [24]
3 years ago
11

20 - 9w = 4(15 - w) solve for w​

Mathematics
2 answers:
posledela3 years ago
8 0

Answer:

w = -8

Step-by-step explanation:

  step 1:(20 - 9w) -  4 • (15 - w)  = 0

step 2:   -5w - 40  =   -5 • (w + 8)

 step 3:   -5 • (w + 8)  = 0

 step 4:  Subtract  8  from both sides of the equation :

                     w = -8

Firlakuza [10]3 years ago
6 0
20-9w=4(15-w)
20-9w=60-4w
+9w +9w
20 = 60+5w
-60 -60
-40=5w
Divide by 5 on both sides to get w alone.
-8 = w
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but its asking for the perimeter and we know that perimeter is all of the sides of the rectangle added up. Heres a picture
   
       ___3.5___
      |                 |
      |                 |
 12 |                 |  12 
      |                 |
      ************
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see now we just add those all up together:)

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