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aksik [14]
3 years ago
5

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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<img src="https://tex.z-dn.net/?f=2x%5E%7B2%7D%20-%2014x%20%2B%2024" id="TexFormula1" title="2x^{2} - 14x + 24" alt="2x^{2} - 14
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