sqrt(169-144)=sqrt(169)-sqrt(144)

解答

169 - 144 = 169 - 144

假

求解步骤

169 - 144 = 169 - 144

化简

169 - 144 : 5

化简

169 - 144 : 1

5 = 1

两侧不相等

假

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

\frac{x - 7}{6} + \frac{4}{5} = \frac{7}{15}

5 - 2 x = 4 x - 7

so l v e f or x, g = f + 3

- 3.6 a + 1.3 = 0.2 (a - 3)