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faust18 [17]
3 years ago
8

What is the x-value in the solution to this system of linear equations?

Mathematics
1 answer:
ASHA 777 [7]3 years ago
8 0

Answer:

  4

Step-by-step explanation:

The y-variable can be eliminated by adding 3 times the first equation to the second:

  3(2x -y) +(x +3y) = 3(11) +(-5)

  7x = 28 . . . .  simplify

  x = 4 . . . . . . . divide by 7

_____

Using Cramer's Rule, you can also find the x-value. The math is not so different.

  x = ((-1)(-5) -(3)(11))/(-1(1) -3(2)) = -28/-7 = 4

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7 0
3 years ago
(x-2)=-1/4(x-8) <br> please show steps
RSB [31]

Answer:

(

−

2

)

=

−

1

4

(

−

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)

(x-2)=\frac{-1}{4}(x-8)

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Solve

1

Eliminate redundant parentheses

(

−

2

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=

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(

−

8

)

−

2

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4

(

−

8

)

2

Combine multiplied terms into a single fraction

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2

=

−

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4

(

−

8

)

−

2

=

−

1

(

−

8

)

4

3

Distribute

−

2

=

−

1

(

−

8

)

4

−

2

=

−

+

8

4

4

Add

2

2

2

to both sides of the equation

−

2

=

−

+

8

4

−

2

+

2

=

−

+

8

4

+

2

5

Simplify

Add the numbers

=

−

+

8

4

+

2

Solution

=

1

6

5

Step-by-step explanation:

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3 years ago
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Vitek1552 [10]

Answer:

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