Odpowiedź:
5x-7-x=9-2x-4
5x-x+2x=9-4+7
6x=12
x=2
5x-x+2x=7+9-4
6x=12/:6
5•2-7-2=9-2•2-4
10-9=9-4-4
1=1
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Odpowiedź:
5x-7-x=9-2x-4
5x-x+2x=9-4+7
6x=12
x=2
Odpowiedź:
5x-7-x=9-2x-4
5x-x+2x=7+9-4
6x=12/:6
x=2
5•2-7-2=9-2•2-4
10-9=9-4-4
1=1