化简-9/12-(-7/4)

解答

化简

- \frac{9}{12} - (- \frac{7}{4})

1

求解步骤

- \frac{9}{12} - (- \frac{7}{4})

使用法则:

a - (- b) = a + b

- \frac{9}{12} - (- \frac{7}{4}) = - \frac{9}{12} + \frac{7}{4}

= - \frac{9}{12} + \frac{7}{4}

- \frac{9}{12} + \frac{7}{4} = 1

= 1

\frac{x}{4} - 2 = 1

- 5 x + 10 x + 3 = 5 x + 6

f a c t or x^{2} - 256

3 x^{2} + 1 = 151

7 x^{2} - 2 x - 20 = 8 x^{2} - 15 x + 20