Subtract two mixed numbers: 3 1/2 -1 3/4

Correct answer:

x =  1 34 = 7/4

Step-by-step explanation:

a=321=3+21=23 2+1=26+1=27=321=3.5 b=143=1+43=41 4+3=44+3=47=143=1.75  x=ab=2747=41447=4147=47=143=1.75

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