2(n - 3) < - 13 + 2n

7/4 = n

1.75 = n

Explination:

2(n - 3) < -13 + 2n

distributive property

2n - 6 < -13 + 2n

inverse operations

2n - 6 < -13 + 2n

+2n              +2n

left side would cancel out/right side would add 2n

-6 < -13 + 4n

add 13 on both sides

-6 < -13 + 4n

+13    +13

-13 and 13 cancel each other out/ -6 + 13 = 7

7 < 4n

divide by 4

7 < 4n

---    ---

4       4

4/4 = 0, so it is n by itself. 7/4 = 1.75

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

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