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01-09-2020
Mathematics

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- 9r + 15(12 + 6r) = - 4r - 7r

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01-09-2020

Answer:

r=135

Step-by-step explanation:

-9r + 15 x 18 = -11r

-9r + 270 = -11r

-9r = -11r -270

2r = 270

r = -135

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