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2/5-((7/20)*x) = 2 // - 2
2/5-((7/20)*x)-2 = 0
(-7/20)*x+2/5-2 = 0
-7/20*x-8/5 = 0 // + 8/5
-7/20*x = 8/5 // : -7/20
x = 8/5/(-7/20)
x = -32/7
x = -32/7
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