-x+5x-7+4x=2x-6+4x+3

解答

- x + 5 x - 7 + 4 x = 2 x - 6 + 4 x + 3

x = 2

求解步骤

- x + 5 x - 7 + 4 x = 2 x - 6 + 4 x + 3

两边减去

4 x

- x + 5 x - 7 + 4 x - 4 x = 2 x - 6 + 4 x + 3 - 4 x

化简

- x + 5 x - 7 = 2 x - 6 + 3

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

so l v e f or p, p - q = 0.509

so l v e f or x, 7 x + 3 y - 4 = 0

so l v e f or a, (a + b) (a^{2} - ab + b^{2}) = a^{3} + b^{3}

so l v e f or x, 5 x - 7 y - 35 = 0