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In this question, here we have 8x plus 3y plus 19z is equals to 0 7x plus 8y plus 26z is equals to 0 8x plus 2y plus 17z is equals to 0 here, the metric is 8, 0, 19, 7, 8, 26, 8, 2, 17 here, 0, 0, 0 so, it's equals to 8, 3, 19, 0, 43 by 8 75 by 8, 0, minus 1, minus 2 here, 0, 0, 0 this is comes from r2 minus 7 by 8, r1 plus r2 and r3 minus r1 plus r3 so, here next we have 8, 3, 19, 0, 43 by 8 75 by 8 and 0, 0, minus 11 by 43 here, we have 0, 0, 0 this is comes from r3 is 8 by 4, 43, r2 plus r3 next, we have 8, 3, 19, 0, 43 by 8 75 by 8, 0, 0, minus 11 upon 43 here, we have 0, 0, 0 here, minus 11 upon 43, z is equals to 0 it means z is equals to 0, y is equals to 0 and x is also equals to 0 hence, the point x, y, z is equals to 0, 0, 0 that's all...