1)
=10/14-1/14=9/14
=-1 4/6+3/6=-1 1/6
=98,82
=-3/4*2/3=-1/2
2)
х-(-4 3/5+3 4/7)=-8 1/14
х-(-4 21/35+3 20/35)=-8 1/14
х=-8 1/14-1 1/35
х=-8 5/70-1 2/70
х=-9 1/10
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2*|x+1|=4 2*|-x-1|=4
|x+1|=2 -x-1=2
x=1 -x=3
x=-3
3)
пропорция
270/243=120/х
х=243*120:270=108 семян проросло
4)
=(-2 1/2-1 5/6)*9/13-32/9*(-9/4)=(-2 3/6-1 5/6)*9/13+8=
=-4 1/3*9/13+8=-13/3*9/13+8=-3+8=5
5)
=(6,9-2,7-3,2)/9/16*2/3-5/24*3/1)=1/(3/4-5/8)=1/(6/8-5/8)=1/(1/8)=8