1)8.3-(-3.2+х)=12
8.3 + 3.2 – x = 12
– x = 12 – 3,2 – 8,3
-x = 0.5
x = -0.5
2)-(х-2.25)+4.88=1.3
– x + 2.25 + 4.88 = 1.3
– x = 1,3 – 4,88 – 2,25
-x = -5.83
x = 5.83
3)5+х=-7.8
х=-7.8-5
х=-12,8
4)4-х=-1.2
-х=-1.2-4
-х=-5.2
х=5.2
5)11-х-8=-2.3
– x = – 2,3 + 8 – 11
-x = -5.3
x = 5.3
6)-х+7-18=5
– x = 5 + 18 – 7
-x = 16
x = -16
7)(х+7)-11=8
x + 7 – 11 = 8
x = 8 + 11 – 7
x = 12
8)14-(х+9)=-21
14 – x – 9 = – 21
– x = – 21 + 9 – 14
-x = -26
x = 26
1)8.3-(-3.2+х)=12
8.3 + 3.2 – x = 12
– x = 12 – 3,2 – 8,3
-x = 0.5
x = -0.5
2)-(х-2.25)+4.88=1.3
– x + 2.25 + 4.88 = 1.3
– x = 1,3 – 4,88 – 2,25
-x = -5.83
x = 5.83
3)5+х=-7.8
х=-7.8-5
х=-12,8
4)4-х=-1.2
-х=-1.2-4
-х=-5.2
х=5.2
5)11-х-8=-2.3
– x = – 2,3 + 8 – 11
-x = -5.3
x = 5.3
6)-х+7-18=5
– x = 5 + 18 – 7
-x = 16
x = -16
7)(х+7)-11=8
x + 7 – 11 = 8
x = 8 + 11 – 7
x = 12
8)14-(х+9)=-21
14 – x – 9 = – 21
– x = – 21 + 9 – 14
-x = -26
x = 26