Mark M. answered • 12/01/16
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Mathematics Teacher - NCLB Highly Qualified
a/15 + 4/15 = 9/15
a + 4 = 9 multiply both sides by CD
a = 5 subtract 4 from bot sides
Mark M.
welcome
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12/01/16
Wiilliam R.
i need one more can you do it
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12/01/16
Mark M.
I'll try.
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12/01/16
Wiilliam R.
9y/14 + 3/14 = 9/14
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12/01/16
Mark M.
Multiply both sides by the common denominator, 14.
Then solve for y.
Go for it!
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12/01/16
Wiilliam R.
that my thing i don't under stand how to do it
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12/01/16
Mark M.
9y/14 + 3/14 = 9/14
9y + 3 = 9 multiply both sides by 14 (common denominator)
9y = 6 subtract 3 from both sides
y = 6/9 divide both sides by 9
y = 2/3 reduce
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12/01/16
Wiilliam R.
so you can just take 14 out of the equation then go from there
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12/01/16
Mark M.
Well "take out" is not an algebraic operation. Multiply is.
An example:
2x/3 = 1/9
(9)(2x)/3 = (9)1/9 multiply both sides by LCD, 9
6x = 1 simplify/reduce
x = 1/6 divide both sides by 6
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12/01/16
Wiilliam R.
12/01/16