algebra
posted by aman .
find the pair of parallel lines
1)12y+15x=4
2)4y=5x4
3)15x=12y=4

Algebra  clarifications required 
MathMate
1. slope = 15/12
2. slope = 5/4
3. slope = ? (two equal signs, so the sign of the slop could go either way.
Please clarify.
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