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

EXPLANATION
We want expand:

We expand using the distributive to obtain:


Simplify further by combining the two terms in the middle:

a + and a - = a negative sooo...
-1 - 7 = -8
ANSWER IS B
The first one ,to substitute 3xy from -16 ...so divided both side by 3 .so, (xy =-5.33). the second one,5xy =-20. so,divided both sides by 5 so xy = -4....
20:25 now simp that and you will have your answer