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harkovskaia [24]
2 years ago
5

Please Help 6-10 or just one of them

Mathematics
1 answer:
Free_Kalibri [48]2 years ago
5 0

Answer:

6) 20

7) I think is 2.5 (im not sure)

8) 7

Step-by-step explanation:

6) (5x+9)+(3x+11)=180

    8x+20=180

         -20   -20

          8x=160

Divide 8 on each side

            x=20

7) (17x+1)=(20x-14)

   17x+15 =20x

   +17         +17

     15 = 37x

divide 15 on each side

X=2.5

8) (3x+3)+(10-4)=90

    (3x)+(10x-1)

      13x-`1=90

            +1   +1

         13x=91

Divide 13 on each side

x=7

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Rita started the day with r apps then she deleted 5 apps and still had twice as many apps as Cora has .write and an equation tha
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r - 5 = 2c

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To write an equation for the problem, we first need do declare the value of the number of apps cora has.

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