Question

You and three friends go out for dinner. The bill comes to $77. If you pay $20 and your three friends all ordered the exact same thing, what amount will each of your friends have to pay? I used f as the variable to express how much the friends have to pay. All I need is the 2 step equation I would write to help solve it. Please help. :)

Answer 1

F=(77-20) / 3
 Subtract what is in parenthesis first and then dived by 3 :)

Answer 2

F = (77-20)/3
f=57/3
f=19