An airplane has a total of 130 seats. The number of coach-class seats is 20 more than two times the number of first-class seats. How many of each type of seat are there on the plane? please show work

Question

anonymous · Answer

could you do a check step please

anonymous · Answer

The question is wrong. Check the question.

shane_b · Answer

I reviewed what I posted earlier and saw a silly mistake (I've done a lot of these today..sorry).  Here it is redone:

Let C = coach seats and F = first class seats:
$$C-2F=20$$$$C+F=130$$Solve for one of the unknowns in terms of the other:
$$F=130−C$$Plug that back into the first equation:
$$C-2(130-C)=20$$Solve for C to get 93.33 seats. Now that you know C you can solve for F using one of the equations above:
$$2F+20=93.33$$$$F=36.67$$
As you can see...something is wrong with the original question since the number of coach and first class seats came out to be fractional values.