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Gwar [14]
3 years ago
7

The sum of three numbers is 9. The sum of the first two numbers is 6 more than twice the third number. The second number is the

same as the difference between the first number and twice the third. Find the three numbers.
Mathematics
1 answer:
Westkost [7]3 years ago
7 0
A+b+c=9
a+b=c+6
b=a-2c

hope this helps
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Answer:

x = -13

Step-by-step explanation:

Distribute:

8 - 6x + 10x - 15 = 20 - 5x

Combine like terms:

4x - 7 = 20 - 5x

Isolate Variable

-x = 13

-1(-x) = -1(13)

x = -13

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3 years ago
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Describe what is being done in each step while solving the equation -2x + 6 +6x = 6 ( 2x -3 )
Serggg [28]

-2x + 6 + 6x = 6 (2x - 3) <em>this is the equation</em>

-2x + 6 + 6x = 12x - 18 <em>distributive property has been applied</em>

4x + 6 = 12x - 18 <em>like terms have been added</em>

6 = 8x -18 <em>4x has been</em><em> </em><em>subtracted from both sides</em>

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3 = x <em>8 has been divided from both sides</em>

<em></em>

I hope this helps! Let me know if I need to explain more or if I got something wrong. Have a nice day!

5 0
3 years ago
What description represents the expression 3x+4
spayn [35]

Answer:

The sum of three times a number and 4

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Solve for the 3 sides
mel-nik [20]

Answer:

1. x = 2√3 or 3.46

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Step-by-step explanation:

1. Determination of the value of x.

Angle (θ) = 60°

Opposite = 6

Adjacent = x

Tan θ = Opposite /Adjacent

Tan 60 = 6 / x

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Cross multiply

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Angle (θ) = 60°

Opposite = 6

Hypothenus = y

Sine θ = Opposite /Hypothenus

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√3/2 = 6/y

Cross multiply

y√3 = 2 × 6

y√3 = 12

Divide both side by √3

y = 12/√3

Rationalise

y = (12 / √3) × (√3/√3)

y = 12√3 / 3

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Angle (θ) = 45°

Opposite = y = 4√3

Hypothenus = z

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8 0
3 years ago
3x–x–4x+4x<br> What is this simplfied to? Please use exponents.
madam [21]

im pretty sure you dont need exponents for this bud

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2x

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