#### crappiefisher26

##### New member

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7(3x+11)=9(3-6x)

and

5(2x-1)-3(x-4)=4(x+4)

Thanks.

- Thread starter crappiefisher26
- Start date

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7(3x+11)=9(3-6x)

and

5(2x-1)-3(x-4)=4(x+4)

Thanks.

\(\displaystyle \L 7(3x+11)=7\times3x \;&\; 7\times11\,\to\,21x+77\)

\(\displaystyle \L 9(3-6x)=9\times3\;&\;9\times-6x\,\to\,27-54x\)

Hence: \(\displaystyle \L \;21x+77=27-54x\)

The other works the same way just more distribution. BTW the Distribution Propery and Distributive Propery are the same thing.

- Joined
- Jul 23, 2006

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Still cant figure them out. Help please.

Thanks

Thanks

- Joined
- Jul 23, 2006

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21x+77=27-54x

subtract 21 x from each side

77=27-75x

subtract 27 from each side

50=-77x

divide by -77

- Joined
- Jul 23, 2006

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How bout the first one. I cant figure it out.

- Joined
- Jul 23, 2006

- Messages
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7(3x+11)=9(3-6x)

21x+77=27-54x

subtract 21 x from both sides

77=27-33x

subtract 27

50=-33x

divide by -33

x=1.51 repeating. that doesnt work if ya plug it back into the original equation.

- Joined
- Jul 23, 2006

- Messages
- 49

21x+77=27-54x

subtract 21 from each side

77=27-75x

subtract 27 from each side

50=-75x

divide by -75

x=.6666666667

thats not correct. okay somebody walk through this with me, cause i cant get the right answer.

- Joined
- Jul 23, 2006

- Messages
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Boy, crappy, you sure seem to enjoy complicating your life!crappiefisher26 said:

21x+77=27-54x

subtract 21 from each side

77=27-75x

subtract 27 from each side

50=-75x

divide by -75

x=.6666666667

thats not correct. okay somebody walk through this with me, cause i cant get the right answer.

You're correct to here:

-75x = 50

now dividing by -75 gives:

-75x/-75 = 50/-75

x = -(50/75)

x = - 2/3 : THAT'S IT; STOP!; Stapel told you to STAY with fractions :twisted: