1) а=-5
Б=5
В=-5
Г=-5
2) а=-4
Б=15
В=-108
Г=-7
3)а) х=-48:(-8)
Х=6
Б) х=4 2/3:(-14)
Х=14/3*(-1/14)
Х=-1/3
2x-16=0
2x=0+16
2x=16
x=16|÷2
x=8
4:100=0,04
0,04*28=1,12
0,04*40=1,6
1,60+1,12=2,72
4,00-2,72=1,28
otvet:1,28
3(целых)<span>3/8</span> × 1(целых)<span>1/15</span> = <span>3 + 3·8/8</span> × <span>1 + 1·15/15</span> = <span>27/8</span> × <span>16/15</span> = <span>27·16/8·15</span> = <span>432/120</span> = <span><span>18·24/</span><span>5·24</span></span> = <span>18/5</span> = <span>3 + 3·55</span> = 3(целых)<span>3/5</span> = 3.6