Решите уравнения: а) б)

Решите задачу:

$3(0.4x + 1.4) = x - 0.8 \\\ 1.2x + 4.2 = x - 0.8 \\\ 1.2x-x = - 0.8-4.2 \\\ 0.2x= - 5 \\\ x=- \frac{5}{0.2} \\\ x=-25$

$3x + 1 \frac{2}{9} = x - 3 \frac{10}{27} \\\ 3x -x= - 3 \frac{10}{27} - 1 \frac{2}{9} \\\ 2x= - \frac{91}{27} - \frac{33}{27} \\\ 2x= - \frac{91+33}{27} \\\ 2x= - \frac{124}{27} \\\ x= - \frac{124}{2\cdot27} \\\ x= - \frac{62}{27} \\\ x= -2 \frac{8}{27}$