Help with 10th grade math hw...?

Question

They're fairly simple, but it's just review so...

1. What does it mean for an equation to be written in standard form? and by equation I mean for a line.

2. How do you solve equations with absolute values?

EXAMPLE

-3|4x-9|=-21

3. How do you find the value of a missing variable? What exactly is a missing variable?

EXAMPLE

(-k^z e^3)^2 (-k^2e e^4)^3=k^10 e^18

Please explain your work. Thanks!

Answer 1

y=mx+b

distibute -3 to 4x-9 =-12x+27

then since its absolute everything that is in the lines becomes positive so=12x+27

then you isolate x      12x=6    6/12=.5   x=.5    

its rough, and off the top of my head (no calc) but it think its correct!

thats b.s.  i have no idea what that means...