Question

Please help me

Answer 1

Given the following equation:

https://s3.amazonaws.com/algebranation/testyourself_uploads/upload-20130920-15:31:13/images/4-16.jpg

What should be the value of 10x - 7?

Answer 2

@student_basil

Answer 3

1) cross multiply, and solve for x.
2) when you get the value of the x, plug it into " 10x - 7" to get your final answer.

Answer 4

Oh

Answer 5

Tell me what you get when you finish, to make sure you don't leave with wring answer.

Answer 6

x=-2

Answer 7

10(-2)-7
-20-7
-27

Answer 8

I am thinking that....

\(\Large\color{blue}{ \bf \frac{5}{5x+7}=\frac{4}{2x-3} }\)


\(\Large\color{blue}{ \bf 4(5x+7)=5(2x-3) }\)


\(\Large\color{blue}{ \bf 20x+28~~=~~10x-15 }\)
\(\Large\color{red}{ \bf -10x-28~~~~~-10x-28 }\)


\(\Large\color{blue}{ \bf 10x~~=~-42 }\)

\(\Large\color{green}{ \bf 10x - 7 }\)
\(\Large\color{green}{ \bf 10(-42) - 7 }\)

finish it...

GET IT ?

Answer 9

it is one of like SAT questions you know? you don't even need to find x, you just need to find 10x, and then you can plug it in right away.

Answer 10

Oh I forgot to multiply 7 and 4

Answer 11

-420-7
-427

Answer 12

Yeah, there you go !

Answer 13

Possible answers:
A. -50
B. -43/10
C. -5
D. -36

Answer 14

My bad

Answer 15

Should be B right

Answer 16

it is 10x-7
and -42 is 10x, not just x.

Answer 17

so it would be
-42-7
-49

b/c -42 is a sub for 10x, not just one x.

Answer 18

So the closest, (still pretty dumb,.... but the closest one would be...) A

Answer 19

Isn't it B because the other thing?

Answer 20

?

Answer 21

you know that 10x is -42 right ?

Answer 22

so just subtract 7 from that.....

Answer 23

why is 10x -42

Answer 24

See my colorful solution above ?

Answer 25

OOOOOOOOOOOHH