Question

- 12 = 10n - 40n + 3

Answer 1

`\sf n=\cfrac{1}{2}`

Explanation:

`\sf -12=10n-40n+3`

`\sf 10n-40n+3=-12`

Combine like terms:-

`\sf \:(10n-40n)=-30n`

`\sf -30n+3=-12`

Subtract 3 from both sides:-

`\sf -30n+3-3=-12-3`

Simplify:-

`\sf -30n=-15`

Divide both sides by -30:-

`\sf \cfrac{-30n}{-30}=\cfrac{-15}{-30}`

Simplify:-

`\sf n=\cfrac{1}{2}`

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