a) 3b+ (b+1) = 3b+b+1= 4b+1b) 5a-(a+1)= 5a-a-1= 4a-1c) 2x-(3-5-x)= 2x-3+5+x= 3x+2d) 2a+(3a-2b)+(a+b)= 2a+3a-2b+a+b= 6a-b
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a) 3b+ (b+1) = 3b+b+1= 4b+1
b) 5a-(a+1)= 5a-a-1= 4a-1
c) 2x-(3-5-x)= 2x-3+5+x= 3x+2
d) 2a+(3a-2b)+(a+b)= 2a+3a-2b+a+b= 6a-b