Question

Номера 4и 7 помогите решить

Answer 1

#4 ответ 48 (#2)
#7
$9 = \frac{4x - 1}{3} \\ 4x - 1 = 27 \\ 4x = 28 \\ x = \frac{28}{4} \\ x = 6 \frac{2}{4} \\ x = 6.5$