What is the main idea of the Readworks: when butter was a food group

louverture's prominent role in the haitian success over colonialism and slavery had earned him the admiration of friends and detractors alike.

explanation:

toussaint louverture began his military career as a leader of the 1791 slave rebellion in saint-domingue; he was by then a free man and a jacobin.

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.

the united states presidential election of 1992 was the 52nd quadrennial presidential election. it was held on tuesday, november 3, 1992. democratic governor bill clinton of arkansas defeated incumbent republican president george h. w. bush, independent businessman ross perot of texas, and a number of minor candidates.

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69