What is the first step to solve this equation 4cos(x)=1+2cos(x)?

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3

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What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?