Question

solve (4+X)(5-x)/(2+X)(7-x)=1

Answer 1

Using distributive property multiply numerator and denominator
(20-4x+5x-x²) / (14-2x+7x-x²)=1
20+x-x² / 14+5x-x² =1
20+x-x² = 14+5x-x²
X² gets canceled
Shift 14 to lhs and x to rhs
6=4x
X=6/4
X=3/2=1.5

Answer 2

20-4x+5x-x²) / (14-2x+7x-x²)=1

20+x-x² / 14+5x-x² =1

20+x-x² = 14+5x-x²

X² gets canceled

Shift 14 to l.h.s and x to r.h.s.

6=4x

X=6/4

X=3/2=1.5