№ 378
а)=1/4-1/12=1/6
б)=2-1/6=11/6=1 5/6
№ 426
а)7.3х-34.31=38.69
7.3х=38.69+34.31
7.3х=73
х=10
б)20.88-5.8а=14.5
5.8а=20.88-14.5
5.8а=6.38
а=1.1
№378 а) 1/4-(1-11/12)=1/4-1/12=3/12-1/12=2/12=1/6 б)2-(13/33-5/22)=2-(26/66-15/66)=2-11/66=1 6/6-1/6=1 15/18
№ 378
а)=1/4-1/12=1/6
б)=2-1/6=11/6=1 5/6
№ 426
а)7.3х-34.31=38.69
7.3х=38.69+34.31
7.3х=73
х=10
б)20.88-5.8а=14.5
5.8а=20.88-14.5
5.8а=6.38
а=1.1
№378 а) 1/4-(1-11/12)=1/4-1/12=3/12-1/12=2/12=1/6 б)2-(13/33-5/22)=2-(26/66-15/66)=2-11/66=1 6/6-1/6=1 15/18