A bicycle manufacturer builds racing bikes and mountain bikes. Materials for the racing bike cost $110 while labor to build them is $120. Materials for the mountain bike cost $140 and labor is $180. The company budgeted $31,800 for labor and $26,150 for materials. How many of each bicycle did they build?

Answer 1

Solve for using substitution or elimination

Answer 2

Hey, I just did this below

Answer 3

I need it to be solved using substitution or elimination

Answer 4

Oh, this is not good

120 nr + 180 nm = $31,800
110 nr + 140 nm = $26,150
is like
12 r + 18 m = 3180
11 r + 14 m = 2615
multiply top eqn by 11, bottom by 12
132 r + 198 m = 34980
132 r + 168 m = 31380
------------------------------------ subtract
30 m = 3600
3 m = 360
m = 120
NOW you can do it.

Answer 5

Thanks

Answer 6

You are welcome.