Question

Решите уравнения:
1) 2.4x-1.2=1.6x-54
2) 2.8+28=1.2x+0.8
3) 0.6*(10x-14)=6*(0.4x+6.4)
4) 0.8*(12x+14)=6x+14

Answer 1

2.4х–1.2=1.6х–54
2.4х–1.2–1.6х+54=0
0.8х+52.8=0
0.8х=–52.8
х=–6.6
2)2.8х+28=1.2х+0.8
2.8х+28–1.2х–0.8=0
1.6х+27.2=0
1.6х=–27.2
х=–17
3)0.6*(10х–14)=6*(0.4х+6.4)
6Х–8.4=2.4х+38.4
6Х–8.4–2.4х–38.4=0
3.6х–46.8=0
3.6х=46.8
х=13
4)0.8*(12х+14)=6х+14
9.6х+11.2–6х–14=0
3.6х–2.8=0
3.6х=2.8
Х=0.777

Answer 2

1)2.4х–1.2=1.6х–54
2.4х–1.2–1.6х+54=0
0.8х+52.8=0
0.8х=–52.8
х=–6.6
4)0.8*(12х+14)=6х+14
9.6х+11.2–6х–14=0
3.6х–2.8=0
3.6х=2.8
Х=0.777

 

2 и 3 решить не смогла :(