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1)
![left { {{ix-2y = 3} atop {x+(1+i)y=-1}} right. \\
x = -1-(1+i)y\
ix = -i-(i-1)y\
-i-(i-1)y-2y = 3\
-i-(i+1)y = 3\
y = -frac{3+i}{1+i} = -frac{(3+i)(1-i)}{2} = -frac{3+1-2i}{2} = -2+i\
x = -1-(1+i)y = -1+(2-i)(1+i) = -1+2+1+i = 2+i
left { {{ix-2y = 3} atop {x+(1+i)y=-1}} right. \\
x = -1-(1+i)y\
ix = -i-(i-1)y\
-i-(i-1)y-2y = 3\
-i-(i+1)y = 3\
y = -frac{3+i}{1+i} = -frac{(3+i)(1-i)}{2} = -frac{3+1-2i}{2} = -2+i\
x = -1-(1+i)y = -1+(2-i)(1+i) = -1+2+1+i = 2+i](https://tex.z-dn.net/?f=+left+%7B+%7B%7Bix-2y+%3D+3%7D+atop+%7Bx%2B%281%2Bi%29y%3D-1%7D%7D+right.+%5C%5C%0Ax+%3D+-1-%281%2Bi%29y%5C%0Aix+%3D+-i-%28i-1%29y%5C%0A-i-%28i-1%29y-2y+%3D+3%5C%0A-i-%28i%2B1%29y+%3D+3%5C%0Ay+%3D+-frac%7B3%2Bi%7D%7B1%2Bi%7D+%3D+-frac%7B%283%2Bi%29%281-i%29%7D%7B2%7D+%3D+-frac%7B3%2B1-2i%7D%7B2%7D+%3D+-2%2Bi%5C%0Ax+%3D+-1-%281%2Bi%29y+%3D+-1%2B%282-i%29%281%2Bi%29+%3D+-1%2B2%2B1%2Bi+%3D+2%2Bi%0A)
2)
![frac{x}{i}-frac{2y}{1-i} = 2-i\
-ix -frac{2y(1+i)}{2} = 2-i\
-ix -y(1+i) = 2-i\\
text{Re}: -y = 2;quad y = -2\
text{Im}: -x - y = -1;quad x = 3 frac{x}{i}-frac{2y}{1-i} = 2-i\
-ix -frac{2y(1+i)}{2} = 2-i\
-ix -y(1+i) = 2-i\\
text{Re}: -y = 2;quad y = -2\
text{Im}: -x - y = -1;quad x = 3](https://tex.z-dn.net/?f=frac%7Bx%7D%7Bi%7D-frac%7B2y%7D%7B1-i%7D+%3D+2-i%5C%0A-ix+-frac%7B2y%281%2Bi%29%7D%7B2%7D+%3D+2-i%5C%0A-ix+-y%281%2Bi%29+%3D+2-i%5C%5C%0Atext%7BRe%7D%3A+-y+%3D+2%3Bquad+y+%3D+-2%5C%0Atext%7BIm%7D%3A+-x+-+y+%3D+-1%3Bquad+x+%3D+3)
2)
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