Odpowiedź :
2x - 5 = 13
2x = 13 + 5
2x = 18 / : 2
x = 9
1/2x + 12 = 0
1/2x = -12 / * 2
x = -24
6 = 3x - 18
3x - 18 = 6
3x = 6 + 18
3x = 24 / : 3
x = 8
2 = 5x + 1
5x + 1 = 2
5x = 2 - 1
5x = 1 / : 5
x = 1/5
Odpowiedź:
1. 2x-5=13/+5
2x=13+5
2x=18/:2
x=9
2. 1/2x+12=0/-12
1/2x=-12/:1/2
x=24
3. 6=3x-18/+18
24=3x/:3
x=8
4. 2=5x+1/-1
1=5x
5x=1/:5
x=1/5