2a+3r+1.5p=29.75 (1)

a+r+p=13.50 (2)

a+3r+4p=29.00 (3)

Eliminate a by multiplying equation (2) by -1 and adding it to equation (3).

What is the resulting equation?

4r + 5p = 42.50

2r + 3p = 15.50

2r + 3p = 42.50