You earned a 90% on a science test. you answered 20 questions correctly. how many questions were on the test?

22 questions. If this isn’t right don’t be suprised

Ireally wish i can my h

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!