4+5(-3х+7)=-9
4-15х+35=-9
4+9+35=15х
48=15х
х=3,2
5+10(-10х-9)=-3
5-100х-90=-3
-90+5+3=100х
-82=100х
х=-0,82
-7+2(7х-2)=10
-7+14х-4=10
14х=10+4+7
14х=21
х=1,5
-7-2(5х-6)=-2
-7-10х+12=-2
12-7+2=10х
7=10х
х=0,7
-9-2(-2х+1)=-2
-9+4х-2=-2
4х=9-2+2
4х=9
х=2,25
<span>1)5/9 < 8/9</span>
<span>2)4\11 и 4\39</span>
<span>156/429 > 44/429</span>
<span>3)3/19 и 8\5</span>
15/95 < 152/95
<span>4)3.4/7 < 4.3/7</span>
1)7+10=17
2)17+7=24
3)17-10=7
4)17-7=10
5) 17-10=7
6)17-7=10
(45+825) : (51:17) =290
1. 45 + 825 = 870
2. 51:17=3
3.870:3=290
(11×123) ×21=28413
1. 11×123=1353
2. 1353×21=28413
52988:(37+29)=
1. 37+29=66
2.52988:66= 802,8484848485