Let's call the number of marbles in the first box "x".
Then, the number of marbles in the other four boxes combined is 725 - x.
We also know that the first box has 20 more marbles than the other four, so:
x = (725 - x) + 20
Simplifying:
2x = 745
x = 372.5
Since we can't have half a marble, we round up to the nearest whole number.
Therefore, there are 373 marbles in the first box.
Five boxes together have 725 marbles.
If the first box has 20 marbles more than
the other four ,how many marbles are
there in the first box
1 answer