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1)5 17/32+3 1/32=8 9/16
8 9/16-4 7/16=4 1/8
4 1/8+2 19/64=4 8/64+2 19/64=6 27/64

2) -12+х+21.6=-72.6
х=-72.6-21.6+12
х=-82.2

3) =-18/5*(-m)*q*(-29/12n)=-8.7mqn

4)3/14x-5/28x=6/28x-5/28x=1/28x
1 11/24y-7/12y=1 11/24y-14/24y=21/24y=7/8y
=1/28x+7/8y