Question

в)26/27:×=13/54        г) ×+3/7=1 д) ×:3/7=14/15 е) ×-5/16=1/4
    
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Answer 1

в)26/27:×=13/54      
х = 26/27 :13/54
х = 26/27 * 54/13 = 2/1 * 2/1 = 4
х = 4
26/27 : 4 = 13/54
26/27 : 4/1 = 13/54
26/27 * 1/4 = 13/54
13/27 * 1/2 = 13/54
13/54 = 13/54
г) ×+3/7=1
х = 1 - 3/7
х = 1/1 - 3/7 = 7/7 - 3/7
х = 4/7
4/7 - 3/7 = 1
1 = 1
д) ×:3/7=14/15
х = 14/15 * 3/7
х = 2/5 * 1/1
х = 2/5
2/5 : 3/7 = 14/15
2/5 * 7/3 = 14/15
14/15 = 14/15
е) ×-5/16=1/4
х = 1/4 + 5/16
х = 4/16 + 5/16
х = 9/16
9/16 - 5/16 = 1/4
4/16 = 1/4
1/4 = 1/4