Question

PQRS is a rectangle.its diagnols meet at O. find x, if OR= 5x-4 and OS= 2x+5

Answer 1

5x-4=2x+5
5x-2x=5+4
3x=9
x=9÷3
x=3

Answer 2

OR is equal to OS ( both of them are half diagnosis )
so,
5x-4=2x+5
5x-2x = 5+4
3x = 9
x = 3