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[tex](12 \frac{21}{32} - y) + 4 \frac{5}{8} = 6 \frac{1}{16} [/tex]
[tex](x - 4 \frac{4}{12} ) + 5 \frac{4}{15} = 10 \frac{3}{20} [/tex]
[tex]40 \frac{3}{4} + (10 \frac{27}{40} - x) = 45 \frac{3}{40} [/tex]
[tex]100 - (x + 99 \frac{2}{5} ) = \frac{3}{10} [/tex]

Ответ:

Пошаговое объяснение:

1) -у=6 1/16-4 5/8-12 21/32

-y=6 2/32-4 20/32-12 21/32

-y=-11 7/32

y=11 7/32

2) x=10 3/20-5 4/15+4 4/12

x=10 9/60-5 16/60+4 20/60

x=9 13/60

3) -x=45 3/40-10 27/40-40 3/4

-x=45 3/40-10 27/40-40 30/40

-x=-5 37/40

x=5 37/40

4) -x=3/10-99 2/5-100

-x=3/10-99 4/10-100

-x=-199 1/10

x=199 1/10