5x/7+1/7-2x/4-6/4
(5x+1)/7 - (2x+6)/4
now put all over a common denominator:
4(5x+1)/28 - 7(2x+6)/28
(20x+4-14x-42)/28
(6x-38)/28
(3x-19)/14
now put all over a common denominator:
4(5x+1)/28 - 7(2x+6)/28
(20x+4-14x-42)/28
(6x-38)/28
(3x-19)/14