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Maths Puzzle
Numerical Ability
Please help me with this problem on page 402...Thank you very much.
1/5x+3/5y=12/5
-1/5x+3/5y=6/5
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book Other Question
can you please help me with this question?
y-(y+3)=y+6
(2+3r+r^2)/(1+3r+3r^2+r^3)
Can you help me solve this? Thanks.