Question

1.Rezolvați ecuațiile:
1. x+7,2=15
2.9,25+x=11,1
3.5,4-x=2,329
4.10-x=8,75
5.2x+1,9=5,24
6.3x-2,4=3,69
7.5x+2,5=17,15
8.2(2x-6,3)=18,64

Answer 1

x+7,2=15
x=15-7,2
x=7,8

9,25+x=11,1
x=11,1-9,25
x=1,85

5,4-x=2,239
x=5,4-2,239
x=3,161

10-x=8,75
x=10-8,75
x=1,25

2x+1,9=5,24
2x=5,24-1,9
2x=3,34
x=3,34/2
x=1,67

3x-2,4=3,69
3x=3,69+2,4
3x=6,09
x=6,09/3
x=2,03

5x+2,5=17,15
5x=17,15-2,5
5x=14,65
x=14,65/5
x=2,93

2(2x-6,3)=18,64
4x-12,6=18,64
4x=18,64+12,6
4x=31,24
x=31,24/4
x=7,81

Sper ca te-am ajutat..