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2/7-((3*x)/2)-(4*x)+1 = 7 // - 7
2/7-((3*x)/2)-(4*x)-7+1 = 0
(-3/2)*x-4*x+2/7-7+1 = 0
-11/2*x-40/7 = 0 // + 40/7
-11/2*x = 40/7 // : -11/2
x = 40/7/(-11/2)
x = -80/77
x = -80/77
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