(-x+1)+(2x-1)=? -4x+3x=? -y-y=? (3x+2)+(2x-1)=?
=-x+2x+1-1 =x =-2y =3x+2x+2-1
=3x =5x+1
-3x²y + 2x²y=? -7x+x=? (2x+1)+(3x+7)=? (5x+7)+(5x+3)=?
=-x²y =-6x =2x+3x+1+7 = -5x+5x+7+3
=5x+8 =10
3x-x+1=? 2x-5x=? 4x²-3x²+2x²=? x-(x-1)=?
=2x+1 =-3x =3x² =x-1
(-3x+8)+(-5x-2)=? (5x-4)+(-4x+3)=? a-7a=? (2x-4)+(-7x+3)=?
=-3x-5x+8-2 =5x-4x-4+3 =-6a =2x+-x-4+3
=-8x+6 =x-1 =x-1
8x+x=? -a-6a=? x+2-3x+9=?
=9x =-7 =(x-3x)+(2+9)
=-2x+11
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