Question

Solve for x: 2 over 5 (x − 4) = 2x.

Answer 1

\[\frac{2}{5(x-4)}=2x\]
multiply both sides by 5(x-4)

\[\frac{2}{5(x-4)}*5(x-4)=2x*5(x-4)\]

Answer 2

simplify
2=10x(x - 4)

Answer 3

thx

Answer 4

will you continue on your own?

Answer 5

i forgot how to simplify

Answer 6

how do you forget how to simplify

Answer 7

idk i forgot

Answer 8

can someone please help?

Answer 9

by simplifying all you need to do is ditribute the 10x

so

\[2 = 10x^2 -40x\]

rewrite the equation and you get

\[10x^2 - 40x - 2 = 0\]

so you can now solve for x, using the general quadratic formula

so make it a little easier, divide every term by 2

\[5x^2 - 20x - 1 = 0\]

Answer 10

i got 13

Answer 11

am i wrong?

Answer 12

well given its a quadratic equation, you need 2 answers...

and you need the formula

\[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]

you have a = 5, b = -20 and c = -1