During the Soviet Era, the government had a great effect on agriculture. Do you believe that the system of agriculture was subsistence farming or commercial farming, or a combination of the two? Explain. PLS HELP!

Agriculture in the Soviet Union was mostly collectivized, with some limited cultivation of private plots. It is often viewed as one of the more inefficient sectors of the economy of the Soviet Union. A number of food taxes (prodrazverstka, prodnalog, and others) were introduced in the early Soviet period despite the Decree on Land that immediately followed the October Revolution. The forced collectivization and class war against (vaguely defined) "kulaks" under Stalinism greatly disrupted farm output in the 1920s and 1930s, contributing to the Soviet famine of 1932–33 (most especially the holodomor in Ukraine).

Explanation:

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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