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4-((3/7)*x) = 205/49 // - 205/49
4-((3/7)*x)-(205/49) = 0
(-3/7)*x-205/49+4 = 0
-3/7*x-9/49 = 0 // + 9/49
-3/7*x = 9/49 // : -3/7
x = 9/49/(-3/7)
x = -3/7
x = -3/7
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