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Q: What is the LCM of 8y and 18y cubed?

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72y

72y^3

The LCM is 40y3

You can only simplify, and by the way you wrote it, it is a bit confusing. I'll assume you mean: 8y + 2 - 18y -5. In order to do this you must combine like terms, or the same things. We can combine 8y and -18y, as they are both y. 8y - 18y = -10y. Now we can combine 2 and -5, as they both are plain. 2 - 5 = -3. Your final answer would be: -10y - 3.

-8y+9=18y-4Add 8y to both sides.9=26y-4Add 4 to both sides.13=26yDivide 13 by 26.1/2=y or 0.5=y

LCM(12x, 8y) = 24xy.

36y

19

10y + 8y = 18y = 15 y = 15/18 y = 5/6 = 0.833333.....

36xy2

The LCM is 45x3

72y^3

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