Homework Help: math

Posted by Ronnie on Thursday, September 2, 2010 at 10:57am.

Solve each equation. What am I doing wrong because the answer is suppose to be 11/2 and I don't get the answer. Here's what I'm doing...

Problem: 2x+1/4-3x-4/5=1/2
I get: 10x+5-12x-16=10
Which gives me -2x=21
My answer is -21/2
the correct answer is suppose to be 11/2

math - Reiny, Thursday, September 2, 2010 at 12:16pm
The way you typed it ...

2x+1/4-3x-4/5=1/2
-x = 1/2 - 1/4 + 4/5
-x = 21/20
x = -21/10 or -1.05

check:
LS = 2(-1.05) + .25 -3(1.05) - .8 = .5
RS = 1/2 = .5

My answer works for the way you wrote the equation
RS =

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