You can put this solution on YOUR website! 2/7j-1/7=3/14
make the denominators equal and to this just multiply the denominators of the first two equations by 2 but you have multiply the numerators too and by the same value
4/14j - 2/14 = 3/14
with the denominators equal you can delete them
4j-2=3
4j=3+2
4j=5
j=5/4
