2х+3у=7 4х-5у=2 5х+8у+z=2 3x-2y+6z=-7 2x+y-z=-5

Question

2х+3у=7
4х-5у=2

5х+8у+z=2
3x-2y+6z=-7
2x+y-z=-5

Answer 1

X+1,5y=3,5
x=3,5-1,5y
4(3,5-1,5y)-5y=2
14-6y-5y=2
11y<<br>