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If \(\begin{bmatrix}7y & 5 \\[0.3em]2x\,-\,3y& -3 \\[0.3em]\end{bmatrix}\)=\(\begin{bmatrix}-21 & 5 \\[0.3em]11& -3 \\[0.3em]\end{bmatrix}\),then find the value of x. |
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Answer» Using equality of two matrices, 7y = – 21 ⇒ y = – 3 2x – 3y = 11 ⇒ 2x + 9 = 11 ⇒ x = 1 ∴ x = 1, y = – 3 |
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