Aeva is selling friendship pins as a service project. each pin with green beads sells for $3. each pin with red beads sells for $2. she raised $312. the number of pins with green beads is 11 fewer than the number of pins with red beads. how many red pins did aeva sell

Aeva sold 30 red pins 

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!