5x - 8y - 7x + 11y =
5 - (6x - 4) + (-2x + 1) =
3y(5 - 7x + y) =
(x + 3)( 2x - 1 ) =
3 - 3( x + 3 ) = 12 + 3x
2x + 1 / 2x = x + 3 / x -1 / - kreska ułamkowa
1 - 2x + 5 / 3 4
5x - 2y + 21
3x + 5y = -6
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5x-8y-7x+11y = -2x+3y
5-(6x-4)+(-2x+1)=
5-6x+4-2x+1=
10-8x
3y(5-7x+y)=
15y-21xy+3ykwadrat
(x+3)(2x-1)=
2xkwadrat - x+6x-3=
2xkwadrat +5x-3
3-3(x+3)=12+3x
3-3x-9=12+3x
-3x-3x=12+9-3
-6x=18 / : (-6)
x=-3