How did the delegates balance the power of the central government with the power of the states?

The bicameral congress

Explanation:

The creation house of represenatives and the senate was how they balanced the power. It was part of the New Jersey plan and Virginia plan

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.