195) 0,8(3х-14)-0,3(4-5х) при х=3(1/13)
2,4х - 11,2 -1,2 +1,5х
3,9х-12,4
3,9*3(1/13)=39/10*40/13=12
12-12,4=-0,4
3(1/8)(-у+8)-4(3/8)(у-16) при у=-0,6
-25/8у+25-35/8у+70
-60/8у+95
-60/8*-6/10+95=4,5+95=99,5
199)
(7/16-32):(-17/24+27/40)
1)(35-155)/80=-12/8
2)(-85+81)/120=-4/120
3)-12/8*120/-4=45
-3(3/4)-(-8(2/9)-(-4,5):9/14)*2(1/4)
1)-4(1/2):9/14=-9/2*14/9=-7
2)-8(2/9)+7=-1(2/9)
3)-1(2/9)*2(1/4)=-11/4
4)-3(3/4)+11/4=-1