b batuannya guys thx ꒰⑅ᵕ༚ᵕ꒱˖♡
2A + B = C
[tex]2 \left[\begin{array}{ccc}3&x\\1&y\end{array}\right] + \left[\begin{array}{ccc}5&-2\\4&2x\end{array}\right] = \left[\begin{array}{ccc}11&4\\6&-2\end{array}\right][/tex]
[tex]\left[\begin{array}{ccc}6&2x\\2&2y\end{array}\right] + \left[\begin{array}{ccc}5&-2\\4&2x\end{array}\right] = \left[\begin{array}{ccc}11&4\\6&-2\end{array}\right][/tex]
[tex]\left[\begin{array}{ccc}11&2x + (-2)\\6&2y +2x\end{array}\right] = \left[\begin{array}{ccc}11&4\\6&-2\end{array}\right][/tex]
2y + 2x = -2
y + x = -1
jadi x + y = -1
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