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I am Lyosha [343]
3 years ago
14

3/4(x-12) =12 solve for x

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
7 0

Answer:

<h2>x = 28</h2>

Step-by-step explanation:

\frac{3}{4}( x - 12) = 12

Multiply through by 4 to eliminate the fraction

That's

4 \times  \frac{3}{4} (x - 12) = 12 \times 4 \\ 3(x - 12) = 48

<u>Expand the terms in the bracket</u>

3x - 36 = 48

<u>Add 36 to both sides of the equation</u>

That's

3x + 36 - 36 = 48 + 36 \\ 3x = 84

<u>Divide both sides by 3</u>

\frac{3x}{3}  =  \frac{84}{ 3}  \\

We have the final answer as

<h3>x = 28</h3>

Hope this helps you

Varvara68 [4.7K]3 years ago
5 0

Answer:

x=28

Step-by-step explanation:

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nataly862011 [7]

Let (<em>x</em>, <em>y</em>, <em>z</em>) be a point on the plane in the first octant. The box formed by this point has volume <em>xyz</em>, and you want to maximize this subject to the equation of the plane.

Use the method of Lagrange multipliers: the Lagrangian is

<em>L</em>(<em>x</em>, <em>y</em>, <em>z</em>) = <em>xyz</em> - <em>λ</em> (<em>x</em> + 2<em>y</em> + 3<em>z</em> - 6)

Find its critical points:

∂<em>L</em>/∂<em>x</em> = <em>yz</em> - <em>λ</em> = 0

∂<em>L</em>/∂<em>y</em> = <em>xz</em> - 2<em>λ</em> = 0

∂<em>L</em>/∂<em>z</em> = <em>xy</em> - 3<em>λ</em> = 0

∂<em>L</em>/∂<em>λ</em> = -(<em>x</em> + 2<em>y</em> + 3<em>z</em> - 6) = 0

Solving the first three equations for <em>λ</em> gives

<em>λ</em> = <em>yz</em> = <em>xz</em>/2 = <em>xy</em>/3

Solve these equations for <em>y</em> and <em>z</em> :

• <em>yz</em> = <em>xz</em>/2   =>   <em>y</em> = <em>x</em>/2   =>   2<em>y</em> = <em>x</em>

• <em>yz</em> = <em>xy</em>/3   =>   <em>z</em> = <em>x</em>/3   =>   3<em>z</em> = <em>x</em>

Substitute these solutions into the last equation and solve for <em>x</em>, then again for <em>y</em> and <em>z</em> :

<em>x</em> + 2<em>y</em> + 3<em>z</em> - 6 = 3<em>x</em> - 6 = 0   =>   3<em>x</em> = 6   =>   <em>x</em> = 2, <em>y</em> = 1, <em>z</em> = 2/3

At this critical point, the maximum volume is

<em>xyz</em> = 2*1*2/3 = 4/3

4 0
3 years ago
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