jak to bliczyc usuwając nawiasy: a)2x-3+(x+4) b)-4x+(3x-1) c)y+8+(2y-5) d)4a-3+(5-2a) e)x-6y+(-3x+7y) f)3x-y+(2y-x) g)(4x-2)+(-3x+7) h)(-5z+1)+(-6z+2) i)(2-3x)+(2x-3) j)(2a-3b)+(-3a+4b)
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a)
2x-3+(x+4) = 2x-3+x+4 = 3x + 1
b)
-4x+(3x-1) = -4x+ 3x-1 = -x - 1
c)
y+8+(2y-5) = y+8+ 2y-5 = 3y +3
d)
4a-3+(5-2a) = 4a-3+5-2a = 2a + 2
e)
x-6y+(-3x+7y) = x-6y-3x+7y = -2x +y
f)
3x-y+(2y-x) = 3x-y+ 2y-x = 2x + y
g)
(4x-2)+(-3x+7) = 4x-2 -3x+7 = x + 5
h)
(-5z+1)+(-6z+2) = -5z+1 - 6z+2 = -11z + 3
i)
(2-3x)+(2x-3) = 2-3x+2x-3 = -x -1
j)
(2a-3b)+(-3a+4b) = 2a-3b - 3a+4b = -a + b