Ответ: в) x = -6; г) y = -12
в) \(\frac{1}{3}(3x – 6) – \frac{2}{7}(7x – 21) = 9\)
x - 2 - 2x + 6 = 9
-x + 4 = 9
-x = 5
x = -5
г) 5,4(3у – 2) – 7,2(2y – 3) = 1,2
16.2y - 10.8 - 14.4y + 21.6 = 1.2
1.8y + 10.8 = 1.2
1.8y = -9.6
y = -5.(3)
Ответ: в) x = -5; г) y = -5.(3)