Question

Решите с 7 по 10 пожалуйста

Answer 1

$7) 5.6 - 7y = - 8y + 3.6 + 2.4 \\ 8y - 7y = 6 - 5.6 \\ y = 0.4$
$8) 0.4x + 3 = 0.6x + 0.2 - x \\ 0.4x + 0.4x = 0.2 - 3 \\ 0.8x = - 2.8 \\ x = \frac{28}{8} \\ x = \frac{7}{2} = 3.5$
$9) 3.4 - 0.6 = 2x - 0.4x - 1 \\ 2.8 + 1 = 1.6x \\ x = 3.8 \div 1.6 \\ x = \frac{19}{8} \\ x = 2 \frac{3}{8}$
$0.8x - 0.7x - 0.36 = 7.1 \\ 0.1x = 7.4 \\ x = 74$
$11) x - 0.5 = 0.6x - 0.4 \\ 0.4x = 0.1 \\ x = 0.25$