There are a couple of different ways you could do this.
I'm going to do it with the least number of steps.
4d - 7 = 3d Subtract 4d from both sides.
4d - 4d - 7 = 3d - 4d
-7 = -d Divide both sides by negative one so that the variable will become positive.
-7/-1 = -d/-1
7 = d
Answer:
The total number of marbles is 
Step-by-step explanation:
There is a typo error in the question.
Helena lost her marbles. But then she found them and put them in 4 bags with m marbles in each bag.
So, total marbles are = 4m
She had 3 marbles left over that didn't fit in the bags.
So, the total number of marbles is 
Answer:
61
56+5=61
It says 'how many apples does she have TOMMOROW'
So it might be a trick question
or not :)