What was one way the consuls were prevented from having too much power?

One was considered the dictator.
Consuls could veto each other’s decisions.
The legislative branch approved all decisions.
The army was allowed to override their decisions.

Consuls could veto each other’s decisions.

Explanation:

In the history of Rome, during the period of Republic consuls had the highest rank in the country, which enabled them to led the army, administrate the political affairs. But, still as the Romans were afraid that the consul could take too much power for himself, they have decided to introduce two consuls, and through that to prevent this type of things from happening. One of days for doing that is the possibility that one consul could veto the decision of the other one.

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.