Answer:
4x - y = 8 ( x = 2 + y/4 )
x + y = 22 ( y = 22- x)
8x + y = 24 ( x = 3 - y/8 )
x - 2y = 20 ( y = - 10 + x/2 )
5x + 3y = 10 ( x = 2 - 3y/5 )
x - y = -10 ( y = 10 + x )
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