# Can you find the identity of ax + by?

Algebra Level 4

$\large { \begin{cases} {3a +4x = 6} \\ { 3b + 4y = 1 } \\ { a^2 + b^2= 1 } \\ {x^2 + y^2 = 1 } \end{cases} }$

Given that $$a,b,x$$ and $$y$$ satisfy the system of equations above, find the value of $$ax + by$$.

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