\left\{ \begin{array} { l } { A + B = Y } \\ { 2 A + 4 A = 130 } \end{array} \right.
Solve for A, B, Y
A = \frac{65}{3} = 21\frac{2}{3} \approx 21.666666667
B = -\frac{65}{3} = -21\frac{2}{3} = -21.666666666666668
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