1) г)=(-3ц2/4):5/10-2/10*(-2/1)=-14/4*10/5 + 2/10*2/1=-7+0,4=-6,6
д)=верх=7/1*10/7*3/5=6
низ=252/100*10/84=252/840=3/10
=6/1:3/10=6/1*10/3=20
а)
-3х-9=-12
-3х=-3
х=1
б)
0,02х=-1,4
х=-14/10:2/100
х=-14/10*100/2
х=-70
в)
х=5/1:(-3/4)
х=-5/1*4/3
х=-20/3
х=-6ц2/3