Solve the equation.

–2 3/7 + b = 6 1/7

a.
b = 3 5/7

b.
b = 4 2/7

c.
b = 8 2/7

d.
b = 8 4/7

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$