Question
यदि $\left[ {\begin{array}{*{20}{c}}{x + y}&{2x + z}\\{x - y}&{2z + w}\end{array}} \right] = \left[ {\begin{array}{*{20}{c}}4&7\\0&{10}\end{array}} \right]$, तो $x, y, z, w$ के मान क्रमश: होंगे
तथा $x - y = 0$ .…$(ii)$
समी. $(i)$ व $(ii)$ को हल करने पर $x = 2,\,y = 2$
$\therefore$ $2x + z = 7$
$z = 3$ तथा $2z + w = 10$ $⇒$ $w = 4$.
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