-0.2t=0.6+0.1t

解答

- 0.2 t = 0.6 + 0.1 t

t = - 2

求解步骤

- 0.2 t = 0.6 + 0.1 t

在两边乘以

10

- 2 t = 6 + t

将

t

para o lado esquerdo

- 3 t = 6

两边除以

- 3

t = - 2

so l v e f or y, 4 x + 7 y + 5 x y = 0

\frac{x - 7}{90} - \frac{7}{10} = - 1

so l v e f or a, r = 8 (b - a)

\frac{2}{7} x + \frac{5}{7} x = 6

2 (x - 1) = x + 2