Question

Yg B gmn ya...??
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Answer 1

M = N^T
|(x-2y)...0|  = |8 ....0| 
|1 ......-3y|.....|1....40|
.

-3y  =  40
y = - 40/3

x - 2y = 8
x = 8 + 2y
x= 8  + 2(-40/3)
x = 8 - 80/3
x = -56/3