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December 21, 2014

December 21, 2014

Posted by **Laura** on Tuesday, August 24, 2010 at 2:59pm.

x-2y/5=3(y+2)/4 +3

This is what I did and I don't know if it's right or what to do next. Find the Lcd which is 20.

I get: 4x-8y=15y+30=60 I don't know what to do from here. I'm so confused.

- Math -
**MathMate**, Tuesday, August 24, 2010 at 5:18pmFrom your work, it appears that the original expression is:

**(**x-2y**)**/5=3(y+2)/4 +3

If that is the case, your intermediate calculation is correct:

4x-8y=15y+30**+**60

From here, you will group all terms containing y to the left hand side, and everything else to the right to get:

-15y-8y=-4x+30+60, or

-23y = -4x + 90

Now divide by the coefficient of y, namely -23:

y = (4/23)x - 90/23

Substitute this value of y into the left and right hand sides of the original equation to make sure they are equal (=(3/23)(x+12))

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