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x , y , a , \text { and } b \text { if } \left[ \begin{array} { c c c } { 3 x + 4 y } & { 6 } & { x - 2 y } \\ { a + b } & { 2 a - b } & { - 3 } \end{array} \right] = \left[ \begin{array} { c c } { 2 } & { 6 } \\ { 5 } & { - 5 } \end{array} \right. |
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Answer» 3x+4y=2 x-2y=43x+4y+2x-4y=2+85x=10 so x=26+4y=2 so 4y=-4 so y=-1a+b=5 2a-b=-5a+b+2a-b=5-5=0so 3a=0 a=0 so b=5 |
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