Question

2 (xsobre 3+1)maior do que x-1

Answer 1

$2\cdot \Big( \frac{x}{3+1}}\Big)\ \textgreater \ x-1\\ \\2\cdot \frac{x}{4}}\ \textgreater \ x-1\\ \\ \frac{2x}{4}}\ \textgreater \ x-1\\ \\2x\ \textgreater \ 4\cdot(x-1)\\ \\2x\ \textgreater \ 4x-4\\ \\2x-4x\ \textgreater \ -4\\ \\-2x\ \textgreater \ -4 \ \ \ \ \times(-1)\\ \\2x\ \textless \ 4\\ \\x\ \textless \ \frac{4}{2}\\ \\x\ \textless \ 2$