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x-((3*x)/7)+1/3+2 = (3*x)/7 // - (3*x)/7
x-((3*x)/7)-((3*x)/7)+1/3+2 = 0
(-3/7)*x+x+(-3/7)*x+1/3+2 = 0
1/7*x+7/3 = 0 // - 7/3
1/7*x = -7/3 // : 1/7
x = -7/3/1/7
x = -49/3
x = -49/3
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