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Posted by **Aria** on Monday, August 1, 2011 at 6:11pm.

3/y+5 + 6/7y add and simplify

5-r/8-r = 3/r-8 solve

Can someone help me please? Thanks so much.

- Algebra -
**Damon**, Monday, August 1, 2011 at 6:54pm3/y+5 + 6/7y add and simplify

Perhaps you mean

3/(y+5) + 6/7y

multiply top and bottom of both by

(7y)(y+5)

3(7y)/[7y(y+5)] + 6(y+5)/[7y(y+5)]

[21y + 6y +30]/[7y^2+35y]

[27y+30]/[7y^2+35y]

=========================

5-r/8-r = 3/r-8 solve

parentheses as follows?

(5-r)/(8-r) = -3/(8-r)

multiply both sides by (8-r)

5-r = -3

r = 8

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