Odpowiedzi

2010-01-25T22:46:46+01:00
1)
2x+5=10
2x=10-5
2x=5
x=2,5

2)
6x+4=4x+8
6x-4x=8-4
2x=4
x=2

3)
7x+3=4-3x
7x+3x=4-3
10x=1
x=0,1
2010-01-25T22:49:11+01:00
1)2x+5=10 /-5
2x=5 /:2
x=2,5

(2) 6x+4=4x+8 /-4 / -4x
6x-4x=8-4
2x=4 / :2
x=2

(3) 7x+3=4-3x /+3x/-3
7x+3x=4-3
10x=1 /:10
x=0,1


2010-01-25T22:49:45+01:00
2x + 5 = 10 /-5
2x = 5 /:2
x = 2,5

6x + 4 = 4x + 8
6x - 4x = 8 - 4
2x = 4 /:2
x = 2

7x + 3 = 4 - 3x
7x = 3x = 4 - 3
10x = 1 /:10
x = 0,1