А)8/25 у =16/5 у=16/5 * 25/8 у=10
б)37/12 - 11/6 n =41/24 -11/6 n = 41/24 - 74/27 11/6 n = 33/27 n = 33/27 * 6/11
n = 2/3
д) а(1- 13/18)=1/3 а*5/18=1/3 а = 1/3 *18/5 а=6/5
г) 6 /54 z +21/54 z - 22/54 z = 5/2 5/54 z = 5/2 z = 27
в) 7/12 + 11/30 х = 1/3 * 29/4 7/12 +11/30х =29/12 11/30х =29/12 - 7/12 11/30х=11/6
х= 11/6 *30/11 х=5