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(7/16)*x+1/8 = (3/8)*x // - (3/8)*x
(7/16)*x-((3/8)*x)+1/8 = 0
(7/16)*x+(-3/8)*x+1/8 = 0
1/16*x+1/8 = 0 // - 1/8
1/16*x = -1/8 // : 1/16
x = -1/8/1/16
x = -2
x = -2
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