Algebra
posted by Aria on .
I am having trouble with two problems. I can't seem to get a solid solution to either one of them.
3/y+5 + 6/7y add and simplify
5r/8r = 3/r8 solve
Can someone help me please? Thanks so much.

3/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]
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5r/8r = 3/r8 solve
parentheses as follows?
(5r)/(8r) = 3/(8r)
multiply both sides by (8r)
5r = 3
r = 8