Plz explain the step highlighted

Why are they added and why the sum is equal to1

Asked by lovemaan5500 | 18th Jan, 2018, 01:18: PM

Expert Answer:

begin mathsize 16px style Intercept space on space straight y minus axis equals straight a
rightwards double arrow Intercept space on space straight x minus axis equals straight a plus 5
Now comma space the space equation space of space straight a space line space in space intercept space form space is space given space by
fraction numerator straight x over denominator straight x minus intercept end fraction plus fraction numerator straight y over denominator straight y minus intercept end fraction equals 1
Substituting comma space we space get
fraction numerator straight x over denominator straight a plus 5 end fraction plus straight y over straight a equals 1

Remark colon space Hope space it space clarifies space your space doubt. end style

Answered by Rashmi Khot | 18th Jan, 2018, 01:55: PM