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8x-24=0
oznaczam
x=8
y=4
1.)
x+y = 12
2.)
2x-y=12
2x-20+8x+16=8
10x=8-16+20
10x=12/:10
x=1,2
(6+4x)2=14-2x
12+8x=24-2x
8x+2x=24-12
10x=12/:10
x=1,2
:)