Question

Решите уравнения
2.3-x=-5.3
-0.8-(+y)=3.4
-1/6a=-2/3
-b:0.4=-2.5
Пожалуйста

Answer 1

$1) \: 2.3 - x = - 5.3 \\ - x = - 5.3 - 2.3 \\ - x = - 7.6 \\ x = 7.6 \\ 2) \: - 0.8 - ( + y) = 3.4 \\ - 0.8 - y = 3.4 \\ - y = 3.4 + 0.8 \\ - y = 4.2 \\ у = - 4.2 \\ 3) \: - \frac{1}{6a} = - \frac{2}{3} \\ - 12a = - 3 \\ a = 0.25 \\ 4) - b \div 0.4 = - 2.5 \\ - b = - 2.5 \times 0.4 \\ - b = - 1 \\ b = 1$