1)4x+10.4x=13.6
2)12x=2.4
3) 6x-16=30
4)12x-4(8x-2)=14
5)0.4x-0.2(2x-6)=1.2
6)xквадрат=16
7)10xквадрат=20
8)2xквадрат-16=0

1)4x+10.4x=13.6
14.4x=13.6
x=13.6:14.4
13 6/10=13 3/5=68/5
14 4/10=14 2/5=72/5
x=68/5×5/72=34/36=17/18


2)12x=2.4
x=2.4:12
x=0.2

3) 6x-16=30
6x=30+16
6x=46
x=46:6
x=7 4/6=7 2/3

4)12x-4(8x-2)=14
12x-32x+8=14
-20x=14-8
-20x=6
x=6:(-20)
x= - 0.3


5)0.4x-0.2(2x-6)=1.2
0.4x-0.4x+1.2=1.2
1.2=1.2

6)xквадрат=16
x^2=16
x=√16
x=4

7)10xквадрат=20
10x^2=20
x^2=20:10
x^2=2
x=√2


8)2xквадрат-16=0
2x^2-16=0
2x^2=16
x^2=16:2
x^2=8
x= √8

спс

огромное