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b.x-2x+3=-x+3
c.3x-y+2x=5x-y
2a+3a-7
5a-7
b)x-2x+3=-x+3
c)3x-y+2x=5x-y
prosze ;))
b)X-(2x-3)=x-2x+3=-x+3
c)3x-(y-2x)=3x-y+2x=5x-y