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1-4*x = -7/5 // + -7/5
1-4*x-(-7/5) = 0
7/5-4*x+1 = 0
12/5-4*x = 0 // - 12/5
-4*x = -12/5 // : -4
x = -12/5/(-4)
x = 3/5
x = 3/5
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