Question

x+y+z = 7
2x-y+z = 4
Then
11y-10x will beOne by Two speak

Answer 1

The unique solution is (x, y)t = (1, 0)t. ...... i) x + y + z − w = 1, x + y − z + w = 2, 2x + y + z − w = 7, x + y .