Set up multiplication/division of proportions to cancel out units that you don't want and to introduce units that you do want in your final solution...
2678cm(in/2.54cm)(ft/12in)=2678/30.48 ft≈87.86 ft (to nearest hundredth)
I'm not totally sure the exact answer, or if this even helps, but the Y intercept is changing from -2 to 5
Your answer would be 3 and 1/8
the answer in standard form is 2x -5y = -3
