Question

Решите уравнения: А) Б)

Answer 1

$А) \frac{x}{30}- \frac{x}{40}= \frac{3}{4} \\ \frac{4x-3x}{120}= \frac{90}{120} \\ x=90$
$5* \frac{9}{11}x+3x=234 \\ \frac{45}{11} x+3x=243 \\ \frac{78}{11} x=234 \\ x=234* \frac{11}{78} \\ x=33$