-15=2t-11

解答

- 15 = 2 t - 11

t = - 2

求解步骤

- 15 = 2 t - 11

交换两边

2 t - 11 = - 15

将

11

到右边

2 t = - 4

两边除以

2

t = - 2

\frac{( x - 2 )}{2} + x = \frac{( x + 1 )}{3} - \frac{( x + 3 )}{4}

- 2 x - 4 = - 1 (- 2 x - 4)

- 43 = \frac{x}{5} - 475 x - 47

so l v e f or x, 7 x + 2 y = 2

5 (2 - x) + 3 (x + 6) = 10 - 4 (6 + 2 x)