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Marta_Voda [28]
2 years ago
8

Solve for x: 3-x = 3(6x-9). Describe the process used to solve the equation and show each step.

Mathematics
1 answer:
FromTheMoon [43]2 years ago
5 0

Answer:

x=1.578

Step-by-step explanation:

Given equation is 3-x = 3(6x-9)

We need to find the value of x

3-x = 3(6x-9)

Distribute 3 in the right-hand side  

3-x=18x-27

Add both sides x

3-x+x=18x+x-27\\3=19x-27

Now, add both sides 27

3+27=19x-27+27\\30=19x

Divide both sides by 19

\frac{30}{19}=\frac{19x}{19}\\x=1.578

So, x=1.578

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Work Shown:

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An alternative method involves solving the original equation using the quadratic formula. After you get the two roots x = p and x = q, you should be able to find that p + 1/p = 5 and also q + 1/q = 5 as well.

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p = (5 + sqrt(21))/2

q = (5 - sqrt(21))/2

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