(x+(-2))/5 =-3.2

解答

\frac{x + ( - 2 )}{5} = - 3.2

x = - 14

求解步骤

\frac{x + ( - 2 )}{5} = - 3.2

在两边乘以

5

x - 2 = - 16

将

2

到右边

x = - 14

m \cdot x - 4 x = 3 (8 x - 12) + 15

x = 15 - 2

5 (2 + x) - 9 = 200

\frac{1}{2} \cdot 1 - \frac{1}{4} = - 1, \frac{1}{x} \cdot \frac{1}{( 2 y )} = 8

so l v e f or x, - 8 y - 16 x + 40 = 0