umieść nawiasy tak,aby równość była prawdziwa: -5-2x+3y-7+2y=-2x-y+2
-5 - (2x + 3y - (7 + 2y)) = -2x - y + 2
-5-(2x+3y-(7+2y))=-5-2x-3y+(7+2y)=-5-2x-3y+7+2y=-2x-y+2
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-5 - (2x + 3y - (7 + 2y)) = -2x - y + 2
-5-(2x+3y-(7+2y))=-5-2x-3y+(7+2y)=-5-2x-3y+7+2y=-2x-y+2