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2010-04-12T17:26:52+02:00
1) x=22,5+1,2
x=23,7
2) 4x+2=8
4x=8-5/4
4x=3
x=0,75
3) 4x=12/4
x=3
4) 2x=48/2
x=24
2010-04-12T17:28:08+02:00
-1,2+x=22,5
x=22,5+1,2
x=23,7

2(2x+1)=8
4x+2=8
4x=8-2
4x=6/:4
x=1,5


3x-5+x=7
3x+x=7+5
4x=12/:4
x=3

5x=48+3x
5x-3x=48
2x=48/:2
x=24
2010-04-12T17:32:33+02:00
1. -1,2+x = 22,5 / +1,2
x = 23,7

2. 2(2x + 1) = 8
4x + 2 = 8 /- 2
4x = 6/ :4
x = 1,5

3. 3x-5+x=7
4x-5=7 / +5
4x = 12/:4
x = 3

4. 5x = 48+3x/ -3x
2x = 48/:2
x = 24