а) х=(1/18)+(1/3)+(1/3)
х=(1/18)+(6/18)+(6/18)
х=(13/18)
б)x=(4/7)+(3/4)+(3/7)+(1/4)
x=(7/7)+(4/4)
x=1+1
x=2
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а) х=(1/18)+(1/3)+(1/3)
х=(1/18)+(6/18)+(6/18)
х=(13/18)
б)x=(4/7)+(3/4)+(3/7)+(1/4)
x=(7/7)+(4/4)
x=1+1
x=2