Question

socirooooooooo ..........​

Answer 1

Resposta:

$a) \: \: \: \: \: \: x + 5 = 11 \\ x = 11 - 5 \\ x = 6$

$b) \: \: \: \: x + 10 = 7 \\ x = 7 - 10 \\ x = - 3$

$c) \: \: \: \: x + 6 = - 5 \\ x = - 5 - 6 \\ x = - 11$

$d) \: \: \: \: \frac{x}{4} = 20 \: \: \: \: \: mmc = 4 \\ \\ \frac{x}{4} = \frac{20}{1} = \: \: \: x = 80$

$e) \: \: \: \frac{x}{2} + 5 = 11 \: \: \: \: \: mmc = 2 \\ \\ \frac{x}{2} + \frac{5}{1} = \frac{11}{1} \\ \\ x + 10 = 22 \\ x = 22 - 10 \\ x = 12$

$f) \: \: \: \: \frac{x}{3} - 7 = - 4 \: \: \: \: \: mmc = 3 \\ \\ \frac{x}{3} - \frac{7}{1} = \frac{ - 4}{1} \\ \\ x - 21 = - 12 \\ \\ x = - 12 + 21 \\ \\ x = 9$