Roziwąż równania .
2x+3=15
5x+13=23
2x+3=152x=12 |:2x=65x+13=235x=10 |:5x=2
2x=12 /:2
x=6
5x=10 /:5
x=2
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2x+3=15
2x=12 |:2
x=6
5x+13=23
5x=10 |:5
x=2
2x+3=15
2x=12 /:2
x=6
5x+13=23
5x=10 /:5
x=2