Which equation is equivalent to 3[x + 3(4x – 5)] = 15x – 24?

Mathematics

2 answers:

makkiz [27]3 years ago

5 0

Hello from MrBillDoesMath!

Answer:

x = 7/8

Discussion:

3[x + 3(4x – 5)] = 15x – 24 =>

3x + (3*3)(4x-5) = 15x - 24 =>

3x + 9*(4x) - (3*3)*5 = 15x - 24 =>

3x + 36x - 45 = 15x - 24 => (add 24 to each side)

3x + 36x - 45 + 45 = 15x - 24 + 45 =>

39x = 15x + 21 => (as 45-24 = 21)

39x-15x = 21 => (subtract 15x from both sides)

24x = 21 =>

x = 21/24 = -7/8

Regards,

MrB

P.S. I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!

Anastaziya [24]3 years ago

4 0

I hope this will help

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Find the L.C.M of x^2+x , x^2-1 , x^2-x

Shalnov [3]

Answer:

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Step-by-step explanation:

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Our LCM will be a product of some powers of $x$ , $x+1$ , and $x-1$ . The most each factor occurs in the three expressions is once, so our least common multiple is