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5.7 + 2(w + 1) = 2w + 9
- 8(4 + 9r) = 7(- 2 - 11r)

Sagot :

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Answer:

Step-by-step explanation:

5.7 + 2(w+1)  = 2w + 9

5.7 + 2w + 2 = 2w + 9

7.7 = 9, which is impossible, so there is no solution.

:::::

-8(4+9r) = 7(-2-11r)

-32-72r = -14-77r

5r = 18

r = 3.6

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