Question

Realiza la siguiente ecuación de primer grado: 9/2x +7 = 7x -4

Answer 1

Respuesta:

$\frac{9}{2} x + 7 = 7x - 4 \\ \\ \frac{9}{2} x - 7x = - 4 - 7 \\ \\ \frac{9 - 14}{2} x = - 11 \\ \\ - \frac{5}{2} x = - 11 \\ \\ x = - 11 \div ( - \frac{5}{2} ) \\ \\ x = \frac{22}{5} \\ comprobacion \\ \frac{9}{2} \times \frac{22}{5} + 7 = 7 \times \frac{22}{5} - 4 \\ \\ \frac{198}{10} + 7 = \frac{154}{5} - 4 \\ \\ \frac{198 + 70}{10} = \frac{154 - 20}{5} \\ \\ \frac{268}{10} = \frac{134}{5} \\ \\ \frac{134}{5} = \frac{134}{5}$