Odpowiedź:
odp.A
20-2x=1/2x+10 /•2
40-4x=x+20
-5x=-20 /:(-5)
x=4
x^2-x=16-4=12
20-2x=20-8=12
1/2x+10=2+10=12
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Odpowiedź:
odp.A
20-2x=1/2x+10 /•2
40-4x=x+20
-5x=-20 /:(-5)
x=4
x^2-x=16-4=12
20-2x=20-8=12
1/2x+10=2+10=12