Объяснение:
5/8 x-(1/4 x-1/12 y) +1/3 y=5/8 x-2*1/(2*4) x+ 1/12 y+ 4*1/(4*3) y=(5-3)/8 x+ (1+4)/12 y=1/4 x+ 5/12 y=0,25x+ 5/12 y
9,4y+(2x-11 1/4 y)-3 5/9 x=9,4y+9*2/9 x- 11,25y-32/9 x=-1,85y- 14/9 x=-1,85y-1 5/9 x
2 1/6 y-(7x-1 3/4 y)+2 1/5 x=4*13/(4*6) y-7x+ 6*7/(6*4) y+2,2x=(52+42)/24 y-4,8x=47/12 y-4,8x=3 11/12 y-4,8x
3,5x+(6 1/4 y-7x)-7y=-3,5x+6,25y-7y=-3,5x-0,75y
