1.
а=37.7
б=-4.05
в=27/5×(-10/9)=-6
г=-7/4÷(-21/4)=-7/4×(-4/21)=1/3
2.
=(36.67-11.02)÷(-5.7)+2.5=25.65÷(-5.7)+2.5=
=-4.5+2.5=-2
3.
=6/7(-0.76-2.74)=6/7×(-3.5)=6/7×(-3 1/2)=
=6/7×(-7/2)=-3
4.
а=-12bc
б=31х-27у
в=-7а+28+36-6а=-13а+64
5.
15у+24=0
15у=-24
у1=-24÷15=-1 9/15=-1 3/5
3у-0.9=0
3у=0.9
у2=0.9÷3
у2=0.3
6.
=0.8х-3.2у-3.6х-2.4у=-2.8х-5.6у=-2.8×3-5.6×(-4.5)=
=-8.4+25.2=16.8
7.
0.6х+4.2-0.5х+1.5=-6.8
0.1х+5.7=-6.8
0.1х=-6.8-5.7
0.1х=-12.5
х=-12.5÷0.1
х=-125
1.
а=37.7
б=-4.05
в=27/5×(-10/9)=-6
г=-7/4÷(-21/4)=-7/4×(-4/21)=1/3
2.
=(36.67-11.02)÷(-5.7)+2.5=25.65÷(-5.7)+2.5=
=-4.5+2.5=-2
3.
=6/7(-0.76-2.74)=6/7×(-3.5)=6/7×(-3 1/2)=
=6/7×(-7/2)=-3
4.
а=-12bc
б=31х-27у
в=-7а+28+36-6а=-13а+64
5.
15у+24=0
15у=-24
у1=-24÷15=-1 9/15=-1 3/5
3у-0.9=0
3у=0.9
у2=0.9÷3
у2=0.3
6.
=0.8х-3.2у-3.6х-2.4у=-2.8х-5.6у=-2.8×3-5.6×(-4.5)=
=-8.4+25.2=16.8
7.
0.6х+4.2-0.5х+1.5=-6.8
0.1х+5.7=-6.8
0.1х=-6.8-5.7
0.1х=-12.5
х=-12.5÷0.1
х=-125