Question

x+y-z=0 4x-y=3 y+z=3 answer​

Answer 1

$HEYA \: \\ \\ x + y = z \: ...Equation \: (i) \\ \\ 4x - y = 3 \: ...Equation \: \: (ii) \\ \\ y + z = 3...Equation \: \: (iii) \\ \\ solve \: equation \: (i) and \: (iii) \: we \: have \: \\ \\ x - z = z - 3 \\ \\ x - 2z = - 3 \\ \\ 2z - x = 3 \: ...Equation \: (iv) \\ \\ add \: equation \: \: (ii) \: and \: (iii) \: we \: have \: \: \\ \\ 4x + z = 9...Equation \: ...(v) \\ \\ now \: solve \: equation \: (iv) \: \: and \: \: (v) \: \: we \: get \: \\ \\ z = 7 \div 3 \\ \\ x = 5 \div 3 \\ and \\ \\ y = 2 \div 3$