My teacher laid out the problem please help me fill in the gaps

PROMBLEM (3) Is HMK problem: determine the point at which the electric field is zero using the figure provided. 4blue := 2.5 uC 1.0 m qred := 6.0 uC + -2.5 MC 6.0 JC d:= 1.0 m HMK 1 #31: If you draw the vectors to the left , between, and right of the charges you will find that the only place where the electric field could cancel is in the region to the left. Thus we only need to solve the problem in this region. Eblue + Ered =0 (1) Let the distance from the blue charge to a point left of the charge be x, and the distacne for the red charge to the same point x+d, then Iblue Ered = ke. Ared Eblue = ke. 2 2 (x + d) ? Using (1) and (2) we can show that qblue 1= qred (act d)2 qred (+ d)2 qblue Ared ( + d) qblue d C:= - 1.821 m qred qblue D=x+d=2.821 m