Posted by Anonymous on Tuesday, November 6, 2012 at 5:55am.
If your expression mean :
3 / a + 2 a / 3 a = 11 / 15
Then :
3 / a + 2 a / 3 a = 11 / 15
you can write like :
3 / a + 2 / 3 = 11 / 15
3 / a + 10 / 15 = 11 / 15
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( Becouse 2 / 3 = 10 / 15 )
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Subtract 10 / 15 to both sides
3 / a + 10 / 15 - 10 / 15 = 11 / 15 - 10 / 15
3 / a = 1 / 15 Multiply both sides by a
3 a / a = 1 * a / 15
3 = a / 15 Multiply both sides by 15
3 * 15 = 15 a / 15
45 = a
a = 45