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26-((5/7)*x) = 16 // - 16
26-((5/7)*x)-16 = 0
(-5/7)*x-16+26 = 0
10-5/7*x = 0 // - 10
-5/7*x = -10 // : -5/7
x = -10/(-5/7)
x = 14
x = 14
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