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14-11-2020
Mathematics

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The solution shown for the equation is incorrect. What is the correct solution? What is the error?
-5 (4 - r) = 15
-20 - 5r =15
-5r = 35
r = -7

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ssevenhorcruxes ssevenhorcruxes

14-11-2020

r = 7 not -7
-5(4 - r) = 15
-5(4 - r)/-5 = 15/-5
4 - r = -3
4 - r - 4 = -3 - 4
-r = -7
-r/-1 = -7/-1
r = 7

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