Question

mike and steve have wallets with five and ten dollar bills in them. If together, they have 20 bills total and it tatals $135, how many $5's and 10's do they have?

Answer 1

you have to solve 2 equations simultaneously

let f = $5 and t = $10

f + t = 20 number of bills

5f + 10t = 135 total value

easiest method is to rewrite the 1st equation

t = 20 - f and substitute it into the 2nd equation

5f + 10(20 - f) = 135

distribute and solve for f

when you have the number of $5 then substitute that number into the 1st equation to get the number of $10.

hope this helps

Answer 2

Distribute?

Answer 3

distribute what?

Answer 4

@campbell_st

Answer 5

the 10(20 - f)

so the equation is

5f + 200 - 10f = 135

collect like terms and solve for f

Answer 6

Oh, okay, thanks:)