6+6+6=18
18/2=9
9*5=45
Odp. Hanka ma 45 książek.
5x = 3x + 6*3
5x = 3x + 18
5x - 3x = 18
2x = 18
x = 9
9 * 5 = 45
odp.: Hanka ma 45 książek.
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6+6+6=18
18/2=9
9*5=45
Odp. Hanka ma 45 książek.
5x = 3x + 6*3
5x = 3x + 18
5x - 3x = 18
2x = 18
x = 9
9 * 5 = 45
odp.: Hanka ma 45 książek.