Question

A solução de [(2x+3)/5] - [(4x+2)/2] é:

~~~Explique!!!
RESPOSTA: -37/8

Answer 1

$\frac{2x+3}{5} -\frac{4x+2}{2}=7\\ \\\frac{4x+6}{10} -\frac{20x+10}{10}= \frac{70}{10} \\ \\\frac{(4x+6)-(20x+10)}{10} = \frac{70}{10} \\ \\\frac{4x+6-20x-10}{10} = \frac{70}{10} \\ \\4x+6-20x-10=70\\ \\4x-20x=70-6+10\\ \\-16x=74\\ \\x=\frac{74^{:2}}{-16_{:2}}\\ \\x=-\frac{37}{8}\\ \\S=\{-\frac{37}{8}\}$