Question

Solve the following proportion:

4/a+4=a/8

Answer 1

I cross multiply first, right? @ganeshie8

Answer 2

\(\large \dfrac{4}{a} + 4 = \dfrac{a}{8}\)

Answer 3

like this ?

Answer 4

no, a+4 is under the 4
\[\frac{ 4 }{ a+4 }=\frac{ a }{ 8 }\]

Answer 5

Good :) then you're right !
yes you cross multiply first

Answer 6

\[\frac{ a(a+4) }{ 32 }\]
\[\frac{ a^2+4a}{ 32 }\]

Answer 7

a(a + 4) = (8)(4)
a^2 + 4a = 32
continue...

Answer 8

do I factor out the numerator, i think that's what it's called. (top)

Answer 9

a^2 + 4a - 32 = 0

I believe your gonna have to use quadratic formula

Answer 10

wait....I think you can factor that
(a + 8)(a - 4) = 0

Answer 11

ooooh ok, now I remember!
Yea, like that. The answers are: a=-8 & a=4

Answer 12

yep...thats what I got

Answer 13

Yaaaaay!! I solved the next one, I just want to make sure it's correct.