Question

X×(1+1)=2+4+6+...+2500

Answer 1

X×(1+1)+(x×2+4)+x×(3+7)+...+(x×11+28)=239

Answer 2

X×(1+1)=2+4+6+...+2500

Xx2=1563750

x=1563750:2

x=781875

Answer 3

X × ( 1 + 1 ) = 2 + 4 + 6 +...+ 2500

X x 2 = 1563750

x= 1563750 : 2

x= 781875