Different forms of answer:
2/21x + 15/14
As a single fraction:
2/21x + 15/14 Find common denominator
(2/21x)*(2/2) + (15/14)*(3/3)
4/42x + 45/42
(4x+45)/42
4x + 45
----------
42
(3/7x + 4/7) - (1/3x -1/2) Combine Like Terms
3/7x + 4/7 - 1/3x +1/2
2/21x + 15/14
Different forms of answer:
2/21x + 15/14
As a single fraction:
2/21x + 15/14 Find common denominator
(2/21x)*(2/2) + (15/14)*(3/3)
4/42x + 45/42
(4x+45)/42
4x + 45
----------
42