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1 vote
1 vote
3x(12x – 4) – 9x(4x – 3) = 30

User Fyodor Volchyok
by
3.0k points

2 Answers

10 votes
10 votes

Answer:


x=2

Explanation:


3x\left(12x-4\right)-9x\left(4x-3\right)=30

Expand:
3x\left(12x-4\right)

Apply distributive law:


36x^2-12x

---------

Expand:
-9x(4x-3)

Apply distributive law:


36x^2+27x

---------


36x^2-12x-36x^2+27x

Combine like terms:


36x^2-36x^2-12x+27x


-12x+27x


15x


15x=30

Divide both sides by 15:


(15x)/(15)=(30)/(15)


x=2

OAmalOHopeO

User Xcatliu
by
3.0k points
12 votes
12 votes

Answer:

x is 2

Explanation:


3x(12x - 4) - 9x(4x - 3) = 30

• First open brackets [ by distributive property ]


( {36x}^(2) - 12x) - ( {36x}^(2) - 27x) = 30 \\ \\ - 12x + 27x = 30 \\ \\ 15x = 30 \\ \\ x = 2

User Dan Fitch
by
3.1k points