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Question: i need help with questions 7111214 please please dont do...

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**I need help with QUESTIONS 7,11,12,14 please
In Exercises 7-10, the augmented matrix of a linear system has been reduced by row operations to the form shown. In each case, continue the appropriate row operations and describe the solution set of the original system 1 73-4 0-13 0 0 01 0 0 -2 1-4 9 0 7. 8.0 1 7 0 0 0 20 10 0-4 01 -3 0-7 9. 0 0 0 2 4 12 0 3 -2 0 0 7 0 0 0-3 Solve the systems in Exercises 11-14 24x35 xi 3x25x3-2
Xi-3x2 + 4x3 =-4 3x1-7x2 + 7x3 =-8 12. 13. x1 3 2x1 + 2x2 + 9x3 = 7 14. x1- 3x2 X1 + X2 + 5x3 = 2 x2 + x3=0PLEASE DONT DO THEM ALL
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