- Find the sum of (2+4i) and (3-6i)

(2+4i )+(3-6i)

= 2 + 4i+3 -6i

= 5 - 2i

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!