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3 years ago

1-x-7/3=x+9/4-3x-8/12

Mathematics

1 answer:

lisabon 2012 [21]3 years ago

8 0

Answer:

x = 2 11/12

Step-by-step explanation:

Multiply the equation by 12. This eliminates fractions.

... 12 -12x -28 = 12x +27 -36x -8

Collect terms.

... -16 -12x = -24x +19

Add 24x+16

... 12x = 35

Divide by the coefficient of x

... x = 35/12 = 2 11/12

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Answer:

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Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

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For $x=-2, y=-4$ ------> $k=-4/-2=2$

For $x=-1, y=-3$ ------> $k=-3/-1=3$

This table has different values of k

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Table B

For $x=-2, y=-4$ ------> $k=-4/-2=2$

For $x=-1, y=-2$ ------> $k=-2/-1=2$

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For $x=-2, y=-4$ ------> $k=-4/-2=2$

For $x=-1, y=-2$ ------> $k=-2/-1=2$

For $x=1, y=2$ ------> $k=2/1=2$

For $x=2, y=4$ ------> $k=4/2=2$

This table has the same value of k

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the table C represent a proportional relationship

Table D

For $x=-2, y=-4$ ------> $k=-4/-2=2$

For $x=-1, y=-2$ ------> $k=-2/-1=2$

For $x=1, y=2$ ------> $k=2/1=2$

For $x=2, y=6$ ------> $k=6/2=3$

This table has different values of k

therefore

the table D does not represent a proportional relationship

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