20:x=2 - rozwiąż x
20:x=2
20/x=2/*x
20=2x
2x=20
x=10
20 : x = 2 / *x2x=20 /:2x=20:2=10
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20:x=2
20/x=2/*x
20=2x
2x=20
x=10
20 : x = 2 / *x
2x=20 /:2
x=20:2=10