Question

como resolver
x+5 sobre x-3 = 7

Answer 1

Resposta:

$\frac{x + 5}{x - 3} = \frac{7}{1} \\ \\ 1(x + 5) = 7.(x - 3) \\ \\ x + 5 = 7x - 21 \\ \\ x - 7x = - 21 - 5 \\ \\ - 6x = - 26.( - 1) \\ \\ 6x = 26 \\ x = \frac{26 \div 2}{6 \div 2} \\ \\ x = \frac{13}{3} \\ \\ x = 4.3$