Mary has some trading cards. Julie has 3 times as many trading cards as Mary. They have 36 Trading cards in all. Which equation represents their trading card collection?

the equation that is equal to X+3X=36

Step-by-step explanation:

since they have 36 all together, we know thier total is 36. since it says that julie has three times mary, i used x to represent mary. so julie is 3x. now we know the equation x(Marie)+3x(JUlie)=36(total)

is this a multiple choice question?

if so it's a and c