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a)2x - 5 + 2x + 7 - 3x = 8+ 3y
-3x +2 = 8 + 3y
-3x -3y = 6 /:(-3)
x+y = -2
b)2y - 2 + 3y - 5y + 2 - y =4
-y = 4 / : (-1)
y = -4
Wykonaj działania :
a) (-d + 3) × (-1)= d - 3