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3 years ago

13

Solve for n 19 + 10n = 7n - 20

1 answer:

kakasveta [241]3 years ago

7 0

Answer:

n = -13

Step-by-step explanation:

19 + 10n = 7n - 20

Subtract 7n from each side

19 + 10n-7n = 7n-7n - 20

19+3n = -20

Subtract 19 from each side

19+3n -19 = -20-19

3n = -39

Divide each side by 3

3n/3 = -39/3

n = -13

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$u=x^2\implies\mathrm du=2x\,\mathrm dx$

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