\(2018-x\times15+785=1878\)
\(\Rightarrow2018-\left(x\times15-785\right)=1878\)
\(\Rightarrow x\times15-785=2018-1878\)
\(\Rightarrow x\times15-785=140\)
\(\Rightarrow x\times15=140+785\)
\(\Rightarrow15x=925\)
\(\Rightarrow x=925\div15\)
\(\Rightarrow x=\frac{185}{3}\)
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