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Total Back = Food + Lodging + traveling distance

$3390 = 0.65*600 + 60*x ?

looks good

for part a?

alrght

what about part b?

Looks like you have to explain every step you do to isolate x on one side

these look familiar, i think they want those words
http://www.mathwords.com/e/equation_rules.htm

would that be good to submit?

umm..

flip equation, make a not of the symmetric property a = b then b = a

**note

So what would i say?

I would not use subtraction or division, they are just a fancy word for addition and multiplication

--'Subtract 390 from both sides'
i would put 'ADDITION Property of (-6) to both sides'

no need to put simplified , you just took care of the non alebra numbers

ok, now its good to submit?

---Instead of divide by 60
I would put ; Multiplication property of Equality" multiplied by 1/60

that it??

i think so