SOLUTION: From 8am to noon the temperature rose 4F. From noon to 4pm it fell 3F. From 4pm to 8pm it fell another 6F. At 8pm the temperature was 72F what was the temperature at 8am? I NEED

Algebra ->  Signed-numbers -> SOLUTION: From 8am to noon the temperature rose 4F. From noon to 4pm it fell 3F. From 4pm to 8pm it fell another 6F. At 8pm the temperature was 72F what was the temperature at 8am? I NEED      Log On


   

Question 256272: From 8am to noon the temperature rose 4F. From noon to 4pm it fell 3F. From 4pm to 8pm it fell another 6F. At 8pm the temperature was 72F what was the temperature at 8am?
I NEED HELP FAST, with steps taken
Found 2 solutions by vleith, richwmiller:
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Let x be the temperature at 8am
Given the info in the problem
x+%2B+4+-3+-+6+=+72
x+-+5+=+72
x+=+77

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Work backwards with what you know.
You know the temp at 8pm
72
it had just fallen so add 6
78
before that it fell 3
add 3
81
before that it rose so subtract 4
77
at 8 am