Question

(x+3)(x+7)/(x-5)(x+3)=1

Answer 1

(x+3)(x+7)=(x-5)(x+3)
=
${x}^{2} + 10x + 21 = {x}^{2} - 2x - 15$
=12x=-15-21
=12x=-36
x=-36/12
x=-3

:-) hope it helps u.