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b) 4a + 1
c) 3x - 2
d) 6a + b
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
4b +1
b/ 5a-(a+1)
4a - 1 (przed nawiasem - to zmieniasz znaki na przeciwne
c/ 2x-(3-5-x) = 2x - 3 +5 + x = 3x + 2
d/ 2a+(3a-2b)+(a+b)= 2a + 3a - 2b +a + b = 6a -b