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6.5/1 = x/4 // - x/4
6.5/1-(x/4) = 0
6.5-(x/4) = 0
6.5-1/4*x = 0 // - 6.5
-1/4*x = -6.5 // : -1/4
x = -6.5/(-1/4)
x = 26
x = 26
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