1)7(0.5a+1)+1.5a-9 при а=-0.8;     2)3.5(3-4b)-5.7+8b при b=1.3;  3)-6(2/3c+1)+7c+5 при c=7;   4)0.4(5b-4)-3.4+0.6b приb=5; 5)8(0.25n+0.6)-9n-10 при n=0.4; 6)-0.9(6-5m)=2.5m+12 приm=-0.8
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