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kati45 [8]
3 years ago
8

2. Solve the system of equations using the substitution method.

Mathematics
1 answer:
Dimas [21]3 years ago
7 0

Answer:

x = 1

Step-by-step explanation:

2x + 3y = 20

2x + 3(10-4x) = 20

2x + 30 - 12x = 20

combine like terms

-10x + 30 =  20

        -30      -30

-10x = -10

divide both sides by -10

x = 1

Hope this Helps!!!

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Step-by-step explanation:

3x -20= -2x +10

or,5x=30

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3 0
3 years ago
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irakobra [83]

Answer:

n=4p

Step-by-step explanation:

18n-7p-15n=5p

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lakkis [162]

Answer:

The solutions are

x=1+\sqrt{\frac{7}{3}}

x=1-\sqrt{\frac{7}{3}}

Step-by-step explanation:

we have

3x^{2}-6x-4=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

3x^{2}-6x=4

Factor the leading coefficient

3(x^{2}-2x)=4

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3(x^{2}-2x+1)=4+3

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square root both sides

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x=1(+/-)\sqrt{\frac{7}{3}}

x=1+\sqrt{\frac{7}{3}}

x=1-\sqrt{\frac{7}{3}}

4 0
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Answer:

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Step-by-step explanation:

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